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Finding the Fourth Proportional to 974.40, 1,461.68 and 325.14

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Solution

The fourth proportional to 974.40, 1,461.68 and 325.14 is: 487.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.40 : 1,461.68 = 325.14 : x
  2. Step 2: Convert to fraction form
    974.40/1,461.68 = 325.14/x
  3. Step 3: Cross multiply
    974.40x = 1,461.68 × 325.14
  4. Step 4: Simplify right side
    974.40x = 475,241.70
  5. Step 5: Solve for x
    x = 475,241.70/974.40
  6. Step 6: Final answer
    x = 487.73

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Double scale
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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.