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Finding the Fourth Proportional to 919,497,351.60, 1,379,246,027.40 and 913,757,788.80

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Solution

The fourth proportional to 919,497,351.60, 1,379,246,027.40 and 913,757,788.80 is: 1,370,636,683.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,497,351.60 : 1,379,246,027.40 = 913,757,788.80 : x
  2. Step 2: Convert to fraction form
    919,497,351.60/1,379,246,027.40 = 913,757,788.80/x
  3. Step 3: Cross multiply
    919,497,351.60x = 1,379,246,027.40 × 913,757,788.80
  4. Step 4: Simplify right side
    919,497,351.60x = 1,260,296,800,208,208,128
  5. Step 5: Solve for x
    x = 1,260,296,800,208,208,128/919,497,351.60
  6. Step 6: Final answer
    x = 1,370,636,683.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.