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Finding the Fourth Proportional to 261,645,611.20, 392,468,416.80 and 261,645,611.20

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Solution

The fourth proportional to 261,645,611.20, 392,468,416.80 and 261,645,611.20 is: 392,468,416.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,645,611.20 : 392,468,416.80 = 261,645,611.20 : x
  2. Step 2: Convert to fraction form
    261,645,611.20/392,468,416.80 = 261,645,611.20/x
  3. Step 3: Cross multiply
    261,645,611.20x = 392,468,416.80 × 261,645,611.20
  4. Step 4: Simplify right side
    261,645,611.20x = 102,687,638,790,332,352
  5. Step 5: Solve for x
    x = 102,687,638,790,332,352/261,645,611.20
  6. Step 6: Final answer
    x = 392,468,416.80

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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.