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Finding the Fourth Proportional to 615.92, 921.24 and 451.49

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Solution

The fourth proportional to 615.92, 921.24 and 451.49 is: 675.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.92 : 921.24 = 451.49 : x
  2. Step 2: Convert to fraction form
    615.92/921.24 = 451.49/x
  3. Step 3: Cross multiply
    615.92x = 921.24 × 451.49
  4. Step 4: Simplify right side
    615.92x = 415,926.04
  5. Step 5: Solve for x
    x = 415,926.04/615.92
  6. Step 6: Final answer
    x = 675.30

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Double scale
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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.