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Finding the Fourth Proportional to 903,646,890.60, 1,355,470,335.90 and 628,147,876.20

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Solution

The fourth proportional to 903,646,890.60, 1,355,470,335.90 and 628,147,876.20 is: 942,221,814.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    903,646,890.60 : 1,355,470,335.90 = 628,147,876.20 : x
  2. Step 2: Convert to fraction form
    903,646,890.60/1,355,470,335.90 = 628,147,876.20/x
  3. Step 3: Cross multiply
    903,646,890.60x = 1,355,470,335.90 × 628,147,876.20
  4. Step 4: Simplify right side
    903,646,890.60x = 851,435,812,747,685,760
  5. Step 5: Solve for x
    x = 851,435,812,747,685,760/903,646,890.60
  6. Step 6: Final answer
    x = 942,221,814.30

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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.