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Finding the Fourth Proportional to 418,575.28, 627,546.74 and 215,954.32

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Solution

The fourth proportional to 418,575.28, 627,546.74 and 215,954.32 is: 323,768.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,575.28 : 627,546.74 = 215,954.32 : x
  2. Step 2: Convert to fraction form
    418,575.28/627,546.74 = 215,954.32/x
  3. Step 3: Cross multiply
    418,575.28x = 627,546.74 × 215,954.32
  4. Step 4: Simplify right side
    418,575.28x = 135,521,429,504.92
  5. Step 5: Solve for x
    x = 135,521,429,504.92/418,575.28
  6. Step 6: Final answer
    x = 323,768.35

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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.