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Finding the Fourth Proportional to 418,489.62, 627,640.10 and 118,963.58

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Solution

The fourth proportional to 418,489.62, 627,640.10 and 118,963.58 is: 178,418.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,489.62 : 627,640.10 = 118,963.58 : x
  2. Step 2: Convert to fraction form
    418,489.62/627,640.10 = 118,963.58/x
  3. Step 3: Cross multiply
    418,489.62x = 627,640.10 × 118,963.58
  4. Step 4: Simplify right side
    418,489.62x = 74,666,309,514.54
  5. Step 5: Solve for x
    x = 74,666,309,514.54/418,489.62
  6. Step 6: Final answer
    x = 178,418.55

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1.5x scale

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.