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Finding the Fourth Proportional to 1,451.79, 2,177.80 and 477.89

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Solution

The fourth proportional to 1,451.79, 2,177.80 and 477.89 is: 716.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,451.79 : 2,177.80 = 477.89 : x
  2. Step 2: Convert to fraction form
    1,451.79/2,177.80 = 477.89/x
  3. Step 3: Cross multiply
    1,451.79x = 2,177.80 × 477.89
  4. Step 4: Simplify right side
    1,451.79x = 1,040,753.09
  5. Step 5: Solve for x
    x = 1,040,753.09/1,451.79
  6. Step 6: Final answer
    x = 716.88

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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.