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Finding the Fourth Proportional to 639,738,059.80, 959,607,089.70 and 536,425,929.40

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Solution

The fourth proportional to 639,738,059.80, 959,607,089.70 and 536,425,929.40 is: 804,638,894.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,738,059.80 : 959,607,089.70 = 536,425,929.40 : x
  2. Step 2: Convert to fraction form
    639,738,059.80/959,607,089.70 = 536,425,929.40/x
  3. Step 3: Cross multiply
    639,738,059.80x = 959,607,089.70 × 536,425,929.40
  4. Step 4: Simplify right side
    639,738,059.80x = 514,758,124,951,151,680
  5. Step 5: Solve for x
    x = 514,758,124,951,151,680/639,738,059.80
  6. Step 6: Final answer
    x = 804,638,894.10

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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.