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Finding the Fourth Proportional to 418,570.27, 627,539.23 and 215,949.31

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Solution

The fourth proportional to 418,570.27, 627,539.23 and 215,949.31 is: 323,760.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,570.27 : 627,539.23 = 215,949.31 : x
  2. Step 2: Convert to fraction form
    418,570.27/627,539.23 = 215,949.31/x
  3. Step 3: Cross multiply
    418,570.27x = 627,539.23 × 215,949.31
  4. Step 4: Simplify right side
    418,570.27x = 135,516,662,417.52
  5. Step 5: Solve for x
    x = 135,516,662,417.52/418,570.27
  6. Step 6: Final answer
    x = 323,760.84

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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.