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Finding the Fourth Proportional to 558.68, 771.36 and 349.20

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Solution

The fourth proportional to 558.68, 771.36 and 349.20 is: 482.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.68 : 771.36 = 349.20 : x
  2. Step 2: Convert to fraction form
    558.68/771.36 = 349.20/x
  3. Step 3: Cross multiply
    558.68x = 771.36 × 349.20
  4. Step 4: Simplify right side
    558.68x = 269,358.91
  5. Step 5: Solve for x
    x = 269,358.91/558.68
  6. Step 6: Final answer
    x = 482.13

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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.