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Finding the Fourth Proportional to 615.31, 923.46 and 307.42

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Solution

The fourth proportional to 615.31, 923.46 and 307.42 is: 461.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.31 : 923.46 = 307.42 : x
  2. Step 2: Convert to fraction form
    615.31/923.46 = 307.42/x
  3. Step 3: Cross multiply
    615.31x = 923.46 × 307.42
  4. Step 4: Simplify right side
    615.31x = 283,890.07
  5. Step 5: Solve for x
    x = 283,890.07/615.31
  6. Step 6: Final answer
    x = 461.38

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Double scale
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Similar ratio
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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.