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Finding the Fourth Proportional to 630.74, 946.12 and 321.72

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Solution

The fourth proportional to 630.74, 946.12 and 321.72 is: 482.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.74 : 946.12 = 321.72 : x
  2. Step 2: Convert to fraction form
    630.74/946.12 = 321.72/x
  3. Step 3: Cross multiply
    630.74x = 946.12 × 321.72
  4. Step 4: Simplify right side
    630.74x = 304,385.73
  5. Step 5: Solve for x
    x = 304,385.73/630.74
  6. Step 6: Final answer
    x = 482.59

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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.