Home / 521,591.10-719,966.79-306,720.78

Finding the Fourth Proportional to 521,591.10, 719,966.79 and 306,720.78

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Solution

The fourth proportional to 521,591.10, 719,966.79 and 306,720.78 is: 423,375.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,591.10 : 719,966.79 = 306,720.78 : x
  2. Step 2: Convert to fraction form
    521,591.10/719,966.79 = 306,720.78/x
  3. Step 3: Cross multiply
    521,591.10x = 719,966.79 × 306,720.78
  4. Step 4: Simplify right side
    521,591.10x = 220,828,775,402.90
  5. Step 5: Solve for x
    x = 220,828,775,402.90/521,591.10
  6. Step 6: Final answer
    x = 423,375.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.