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Finding the Fourth Proportional to 754.88, 1,041.54 and 423.20

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Solution

The fourth proportional to 754.88, 1,041.54 and 423.20 is: 583.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.88 : 1,041.54 = 423.20 : x
  2. Step 2: Convert to fraction form
    754.88/1,041.54 = 423.20/x
  3. Step 3: Cross multiply
    754.88x = 1,041.54 × 423.20
  4. Step 4: Simplify right side
    754.88x = 440,779.73
  5. Step 5: Solve for x
    x = 440,779.73/754.88
  6. Step 6: Final answer
    x = 583.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.