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Finding the Fourth Proportional to 648.62, 972.40 and 283.16

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Solution

The fourth proportional to 648.62, 972.40 and 283.16 is: 424.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.62 : 972.40 = 283.16 : x
  2. Step 2: Convert to fraction form
    648.62/972.40 = 283.16/x
  3. Step 3: Cross multiply
    648.62x = 972.40 × 283.16
  4. Step 4: Simplify right side
    648.62x = 275,344.78
  5. Step 5: Solve for x
    x = 275,344.78/648.62
  6. Step 6: Final answer
    x = 424.51

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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.