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Finding the Fourth Proportional to 3,553.70, 5,330.55 and 1,245.20

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Solution

The fourth proportional to 3,553.70, 5,330.55 and 1,245.20 is: 1,867.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,553.70 : 5,330.55 = 1,245.20 : x
  2. Step 2: Convert to fraction form
    3,553.70/5,330.55 = 1,245.20/x
  3. Step 3: Cross multiply
    3,553.70x = 5,330.55 × 1,245.20
  4. Step 4: Simplify right side
    3,553.70x = 6,637,600.86
  5. Step 5: Solve for x
    x = 6,637,600.86/3,553.70
  6. Step 6: Final answer
    x = 1,867.80

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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.