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Finding the Fourth Proportional to 431,569,306.60, 647,353,959.90 and 247,147,469.80

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Solution

The fourth proportional to 431,569,306.60, 647,353,959.90 and 247,147,469.80 is: 370,721,204.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,569,306.60 : 647,353,959.90 = 247,147,469.80 : x
  2. Step 2: Convert to fraction form
    431,569,306.60/647,353,959.90 = 247,147,469.80/x
  3. Step 3: Cross multiply
    431,569,306.60x = 647,353,959.90 × 247,147,469.80
  4. Step 4: Simplify right side
    431,569,306.60x = 159,991,893,254,295,648
  5. Step 5: Solve for x
    x = 159,991,893,254,295,648/431,569,306.60
  6. Step 6: Final answer
    x = 370,721,204.70

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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.