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Finding the Fourth Proportional to 615.38, 921.24 and 371.16

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Solution

The fourth proportional to 615.38, 921.24 and 371.16 is: 555.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.38 : 921.24 = 371.16 : x
  2. Step 2: Convert to fraction form
    615.38/921.24 = 371.16/x
  3. Step 3: Cross multiply
    615.38x = 921.24 × 371.16
  4. Step 4: Simplify right side
    615.38x = 341,927.44
  5. Step 5: Solve for x
    x = 341,927.44/615.38
  6. Step 6: Final answer
    x = 555.64

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Double scale
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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.