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Finding the Fourth Proportional to 754.77, 1,129.56 and 477

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Solution

The fourth proportional to 754.77, 1,129.56 and 477 is: 713.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.77 : 1,129.56 = 477 : x
  2. Step 2: Convert to fraction form
    754.77/1,129.56 = 477/x
  3. Step 3: Cross multiply
    754.77x = 1,129.56 × 477
  4. Step 4: Simplify right side
    754.77x = 538,800.12
  5. Step 5: Solve for x
    x = 538,800.12/754.77
  6. Step 6: Final answer
    x = 713.86

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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.