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Finding the Fourth Proportional to 558.38, 836.77 and 489.74

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Solution

The fourth proportional to 558.38, 836.77 and 489.74 is: 733.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.38 : 836.77 = 489.74 : x
  2. Step 2: Convert to fraction form
    558.38/836.77 = 489.74/x
  3. Step 3: Cross multiply
    558.38x = 836.77 × 489.74
  4. Step 4: Simplify right side
    558.38x = 409,799.74
  5. Step 5: Solve for x
    x = 409,799.74/558.38
  6. Step 6: Final answer
    x = 733.91

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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.