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Finding the Fourth Proportional to 418,573.28, 627,543.74 and 215,952.32

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Solution

The fourth proportional to 418,573.28, 627,543.74 and 215,952.32 is: 323,765.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,573.28 : 627,543.74 = 215,952.32 : x
  2. Step 2: Convert to fraction form
    418,573.28/627,543.74 = 215,952.32/x
  3. Step 3: Cross multiply
    418,573.28x = 627,543.74 × 215,952.32
  4. Step 4: Simplify right side
    418,573.28x = 135,519,522,337.00
  5. Step 5: Solve for x
    x = 135,519,522,337.00/418,573.28
  6. Step 6: Final answer
    x = 323,765.35

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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.