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Finding the Fourth Proportional to 674.19, 1,010.81 and 558.16

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Solution

The fourth proportional to 674.19, 1,010.81 and 558.16 is: 836.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.19 : 1,010.81 = 558.16 : x
  2. Step 2: Convert to fraction form
    674.19/1,010.81 = 558.16/x
  3. Step 3: Cross multiply
    674.19x = 1,010.81 × 558.16
  4. Step 4: Simplify right side
    674.19x = 564,192.58
  5. Step 5: Solve for x
    x = 564,192.58/674.19
  6. Step 6: Final answer
    x = 836.85

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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.