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Finding the Fourth Proportional to 974.31, 1,461.51 and 454.79

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Solution

The fourth proportional to 974.31, 1,461.51 and 454.79 is: 682.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.31 : 1,461.51 = 454.79 : x
  2. Step 2: Convert to fraction form
    974.31/1,461.51 = 454.79/x
  3. Step 3: Cross multiply
    974.31x = 1,461.51 × 454.79
  4. Step 4: Simplify right side
    974.31x = 664,672.83
  5. Step 5: Solve for x
    x = 664,672.83/974.31
  6. Step 6: Final answer
    x = 682.20

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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.