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Finding the Fourth Proportional to 624.12, 930.30 and 614.40

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Solution

The fourth proportional to 624.12, 930.30 and 614.40 is: 915.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.12 : 930.30 = 614.40 : x
  2. Step 2: Convert to fraction form
    624.12/930.30 = 614.40/x
  3. Step 3: Cross multiply
    624.12x = 930.30 × 614.40
  4. Step 4: Simplify right side
    624.12x = 571,576.32
  5. Step 5: Solve for x
    x = 571,576.32/624.12
  6. Step 6: Final answer
    x = 915.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.