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Finding the Fourth Proportional to 426,265,125.20, 639,397,687.80 and 426,265,125.20

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Solution

The fourth proportional to 426,265,125.20, 639,397,687.80 and 426,265,125.20 is: 639,397,687.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,265,125.20 : 639,397,687.80 = 426,265,125.20 : x
  2. Step 2: Convert to fraction form
    426,265,125.20/639,397,687.80 = 426,265,125.20/x
  3. Step 3: Cross multiply
    426,265,125.20x = 639,397,687.80 × 426,265,125.20
  4. Step 4: Simplify right side
    426,265,125.20x = 272,552,935,442,657,472
  5. Step 5: Solve for x
    x = 272,552,935,442,657,472/426,265,125.20
  6. Step 6: Final answer
    x = 639,397,687.80

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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.