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Finding the Fourth Proportional to 754.98, 1,041.90 and 423.45

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Solution

The fourth proportional to 754.98, 1,041.90 and 423.45 is: 584.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.98 : 1,041.90 = 423.45 : x
  2. Step 2: Convert to fraction form
    754.98/1,041.90 = 423.45/x
  3. Step 3: Cross multiply
    754.98x = 1,041.90 × 423.45
  4. Step 4: Simplify right side
    754.98x = 441,192.56
  5. Step 5: Solve for x
    x = 441,192.56/754.98
  6. Step 6: Final answer
    x = 584.38

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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.