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Finding the Fourth Proportional to 1,412.50, 2,118.07 and 487.73

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Solution

The fourth proportional to 1,412.50, 2,118.07 and 487.73 is: 731.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.50 : 2,118.07 = 487.73 : x
  2. Step 2: Convert to fraction form
    1,412.50/2,118.07 = 487.73/x
  3. Step 3: Cross multiply
    1,412.50x = 2,118.07 × 487.73
  4. Step 4: Simplify right side
    1,412.50x = 1,033,049.44
  5. Step 5: Solve for x
    x = 1,033,049.44/1,412.50
  6. Step 6: Final answer
    x = 731.36

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Double scale
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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.