Home / 520,531,969.20-782,073,412.20-391,391,806.20

Finding the Fourth Proportional to 520,531,969.20, 782,073,412.20 and 391,391,806.20

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Solution

The fourth proportional to 520,531,969.20, 782,073,412.20 and 391,391,806.20 is: 588,046,735.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,531,969.20 : 782,073,412.20 = 391,391,806.20 : x
  2. Step 2: Convert to fraction form
    520,531,969.20/782,073,412.20 = 391,391,806.20/x
  3. Step 3: Cross multiply
    520,531,969.20x = 782,073,412.20 × 391,391,806.20
  4. Step 4: Simplify right side
    520,531,969.20x = 306,097,125,381,955,136
  5. Step 5: Solve for x
    x = 306,097,125,381,955,136/520,531,969.20
  6. Step 6: Final answer
    x = 588,046,735.83

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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.