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Finding the Fourth Proportional to 729.64, 1,006.52 and 522.76

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Solution

The fourth proportional to 729.64, 1,006.52 and 522.76 is: 721.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.64 : 1,006.52 = 522.76 : x
  2. Step 2: Convert to fraction form
    729.64/1,006.52 = 522.76/x
  3. Step 3: Cross multiply
    729.64x = 1,006.52 × 522.76
  4. Step 4: Simplify right side
    729.64x = 526,168.40
  5. Step 5: Solve for x
    x = 526,168.40/729.64
  6. Step 6: Final answer
    x = 721.13

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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.