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Finding the Fourth Proportional to 723.68, 1,000.20 and 548.72

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Solution

The fourth proportional to 723.68, 1,000.20 and 548.72 is: 758.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.68 : 1,000.20 = 548.72 : x
  2. Step 2: Convert to fraction form
    723.68/1,000.20 = 548.72/x
  3. Step 3: Cross multiply
    723.68x = 1,000.20 × 548.72
  4. Step 4: Simplify right side
    723.68x = 548,829.74
  5. Step 5: Solve for x
    x = 548,829.74/723.68
  6. Step 6: Final answer
    x = 758.39

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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.