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Finding the Fourth Proportional to 874.02, 1,206.38 and 542.73

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Solution

The fourth proportional to 874.02, 1,206.38 and 542.73 is: 749.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.02 : 1,206.38 = 542.73 : x
  2. Step 2: Convert to fraction form
    874.02/1,206.38 = 542.73/x
  3. Step 3: Cross multiply
    874.02x = 1,206.38 × 542.73
  4. Step 4: Simplify right side
    874.02x = 654,738.62
  5. Step 5: Solve for x
    x = 654,738.62/874.02
  6. Step 6: Final answer
    x = 749.11

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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.