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Finding the Fourth Proportional to 2,658.96, 3,988.44 and 1,487.70

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Solution

The fourth proportional to 2,658.96, 3,988.44 and 1,487.70 is: 2,231.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.96 : 3,988.44 = 1,487.70 : x
  2. Step 2: Convert to fraction form
    2,658.96/3,988.44 = 1,487.70/x
  3. Step 3: Cross multiply
    2,658.96x = 3,988.44 × 1,487.70
  4. Step 4: Simplify right side
    2,658.96x = 5,933,602.19
  5. Step 5: Solve for x
    x = 5,933,602.19/2,658.96
  6. Step 6: Final answer
    x = 2,231.55

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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.