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Finding the Fourth Proportional to 630.21, 939.56 and 614.22

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Solution

The fourth proportional to 630.21, 939.56 and 614.22 is: 915.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.21 : 939.56 = 614.22 : x
  2. Step 2: Convert to fraction form
    630.21/939.56 = 614.22/x
  3. Step 3: Cross multiply
    630.21x = 939.56 × 614.22
  4. Step 4: Simplify right side
    630.21x = 577,096.54
  5. Step 5: Solve for x
    x = 577,096.54/630.21
  6. Step 6: Final answer
    x = 915.72

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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.