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Finding the Fourth Proportional to 483.18, 724.80 and 318.98

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Solution

The fourth proportional to 483.18, 724.80 and 318.98 is: 478.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.18 : 724.80 = 318.98 : x
  2. Step 2: Convert to fraction form
    483.18/724.80 = 318.98/x
  3. Step 3: Cross multiply
    483.18x = 724.80 × 318.98
  4. Step 4: Simplify right side
    483.18x = 231,196.70
  5. Step 5: Solve for x
    x = 231,196.70/483.18
  6. Step 6: Final answer
    x = 478.49

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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.