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Finding the Fourth Proportional to 648.99, 972.13 and 630.53

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Solution

The fourth proportional to 648.99, 972.13 and 630.53 is: 944.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.99 : 972.13 = 630.53 : x
  2. Step 2: Convert to fraction form
    648.99/972.13 = 630.53/x
  3. Step 3: Cross multiply
    648.99x = 972.13 × 630.53
  4. Step 4: Simplify right side
    648.99x = 612,957.13
  5. Step 5: Solve for x
    x = 612,957.13/648.99
  6. Step 6: Final answer
    x = 944.48

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.