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Finding the Fourth Proportional to 754.86, 1,041.80 and 423.30

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Solution

The fourth proportional to 754.86, 1,041.80 and 423.30 is: 584.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.86 : 1,041.80 = 423.30 : x
  2. Step 2: Convert to fraction form
    754.86/1,041.80 = 423.30/x
  3. Step 3: Cross multiply
    754.86x = 1,041.80 × 423.30
  4. Step 4: Simplify right side
    754.86x = 440,993.94
  5. Step 5: Solve for x
    x = 440,993.94/754.86
  6. Step 6: Final answer
    x = 584.21

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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.