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Finding the Fourth Proportional to 974.66, 1,461.92 and 316.52

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Solution

The fourth proportional to 974.66, 1,461.92 and 316.52 is: 474.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.66 : 1,461.92 = 316.52 : x
  2. Step 2: Convert to fraction form
    974.66/1,461.92 = 316.52/x
  3. Step 3: Cross multiply
    974.66x = 1,461.92 × 316.52
  4. Step 4: Simplify right side
    974.66x = 462,726.92
  5. Step 5: Solve for x
    x = 462,726.92/974.66
  6. Step 6: Final answer
    x = 474.76

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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.