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Finding the Fourth Proportional to 1,412.01, 2,118.11 and 487.66

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Solution

The fourth proportional to 1,412.01, 2,118.11 and 487.66 is: 731.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.01 : 2,118.11 = 487.66 : x
  2. Step 2: Convert to fraction form
    1,412.01/2,118.11 = 487.66/x
  3. Step 3: Cross multiply
    1,412.01x = 2,118.11 × 487.66
  4. Step 4: Simplify right side
    1,412.01x = 1,032,917.52
  5. Step 5: Solve for x
    x = 1,032,917.52/1,412.01
  6. Step 6: Final answer
    x = 731.52

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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.