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Finding the Fourth Proportional to 974.36, 1,461.02 and 425.90

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Solution

The fourth proportional to 974.36, 1,461.02 and 425.90 is: 638.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.36 : 1,461.02 = 425.90 : x
  2. Step 2: Convert to fraction form
    974.36/1,461.02 = 425.90/x
  3. Step 3: Cross multiply
    974.36x = 1,461.02 × 425.90
  4. Step 4: Simplify right side
    974.36x = 622,238.98
  5. Step 5: Solve for x
    x = 622,238.98/974.36
  6. Step 6: Final answer
    x = 638.62

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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.