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Finding the Fourth Proportional to 558.42, 839.15 and 298.61

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Solution

The fourth proportional to 558.42, 839.15 and 298.61 is: 448.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.42 : 839.15 = 298.61 : x
  2. Step 2: Convert to fraction form
    558.42/839.15 = 298.61/x
  3. Step 3: Cross multiply
    558.42x = 839.15 × 298.61
  4. Step 4: Simplify right side
    558.42x = 250,572.89
  5. Step 5: Solve for x
    x = 250,572.89/558.42
  6. Step 6: Final answer
    x = 448.72

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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.