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Finding the Fourth Proportional to 974.50, 1,461.91 and 325.39

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Solution

The fourth proportional to 974.50, 1,461.91 and 325.39 is: 488.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.50 : 1,461.91 = 325.39 : x
  2. Step 2: Convert to fraction form
    974.50/1,461.91 = 325.39/x
  3. Step 3: Cross multiply
    974.50x = 1,461.91 × 325.39
  4. Step 4: Simplify right side
    974.50x = 475,690.89
  5. Step 5: Solve for x
    x = 475,690.89/974.50
  6. Step 6: Final answer
    x = 488.14

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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.