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Finding the Fourth Proportional to 731.19, 1,008.45 and 482.42

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Solution

The fourth proportional to 731.19, 1,008.45 and 482.42 is: 665.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.19 : 1,008.45 = 482.42 : x
  2. Step 2: Convert to fraction form
    731.19/1,008.45 = 482.42/x
  3. Step 3: Cross multiply
    731.19x = 1,008.45 × 482.42
  4. Step 4: Simplify right side
    731.19x = 486,496.45
  5. Step 5: Solve for x
    x = 486,496.45/731.19
  6. Step 6: Final answer
    x = 665.35

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.