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Finding the Fourth Proportional to 418,388.40, 627,487.20 and 118,862.64

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Solution

The fourth proportional to 418,388.40, 627,487.20 and 118,862.64 is: 178,266.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,388.40 : 627,487.20 = 118,862.64 : x
  2. Step 2: Convert to fraction form
    418,388.40/627,487.20 = 118,862.64/x
  3. Step 3: Cross multiply
    418,388.40x = 627,487.20 × 118,862.64
  4. Step 4: Simplify right side
    418,388.40x = 74,584,785,158.21
  5. Step 5: Solve for x
    x = 74,584,785,158.21/418,388.40
  6. Step 6: Final answer
    x = 178,266.86

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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.