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Finding the Fourth Proportional to 418,421.40, 627,279.36 and 181,585.68

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Solution

The fourth proportional to 418,421.40, 627,279.36 and 181,585.68 is: 272,225.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,421.40 : 627,279.36 = 181,585.68 : x
  2. Step 2: Convert to fraction form
    418,421.40/627,279.36 = 181,585.68/x
  3. Step 3: Cross multiply
    418,421.40x = 627,279.36 × 181,585.68
  4. Step 4: Simplify right side
    418,421.40x = 113,904,949,135.57
  5. Step 5: Solve for x
    x = 113,904,949,135.57/418,421.40
  6. Step 6: Final answer
    x = 272,225.44

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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.