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Finding the Fourth Proportional to 1,245.91, 1,868.87 and 1,029.03

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Solution

The fourth proportional to 1,245.91, 1,868.87 and 1,029.03 is: 1,543.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.91 : 1,868.87 = 1,029.03 : x
  2. Step 2: Convert to fraction form
    1,245.91/1,868.87 = 1,029.03/x
  3. Step 3: Cross multiply
    1,245.91x = 1,868.87 × 1,029.03
  4. Step 4: Simplify right side
    1,245.91x = 1,923,123.30
  5. Step 5: Solve for x
    x = 1,923,123.30/1,245.91
  6. Step 6: Final answer
    x = 1,543.55

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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.