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Finding the Fourth Proportional to 630.84, 946.56 and 387.24

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Solution

The fourth proportional to 630.84, 946.56 and 387.24 is: 581.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.84 : 946.56 = 387.24 : x
  2. Step 2: Convert to fraction form
    630.84/946.56 = 387.24/x
  3. Step 3: Cross multiply
    630.84x = 946.56 × 387.24
  4. Step 4: Simplify right side
    630.84x = 366,545.89
  5. Step 5: Solve for x
    x = 366,545.89/630.84
  6. Step 6: Final answer
    x = 581.04

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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.