Home / 919,948.60-1,379,987.70-520,780.60

Finding the Fourth Proportional to 919,948.60, 1,379,987.70 and 520,780.60

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Solution

The fourth proportional to 919,948.60, 1,379,987.70 and 520,780.60 is: 781,207.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,948.60 : 1,379,987.70 = 520,780.60 : x
  2. Step 2: Convert to fraction form
    919,948.60/1,379,987.70 = 520,780.60/x
  3. Step 3: Cross multiply
    919,948.60x = 1,379,987.70 × 520,780.60
  4. Step 4: Simplify right side
    919,948.60x = 718,670,822,398.62
  5. Step 5: Solve for x
    x = 718,670,822,398.62/919,948.60
  6. Step 6: Final answer
    x = 781,207.58

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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.