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Finding the Fourth Proportional to 558.78, 771.21 and 337.74

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Solution

The fourth proportional to 558.78, 771.21 and 337.74 is: 466.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.78 : 771.21 = 337.74 : x
  2. Step 2: Convert to fraction form
    558.78/771.21 = 337.74/x
  3. Step 3: Cross multiply
    558.78x = 771.21 × 337.74
  4. Step 4: Simplify right side
    558.78x = 260,468.47
  5. Step 5: Solve for x
    x = 260,468.47/558.78
  6. Step 6: Final answer
    x = 466.14

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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.