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Finding the Fourth Proportional to 558.96, 772.20 and 477

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Solution

The fourth proportional to 558.96, 772.20 and 477 is: 658.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.96 : 772.20 = 477 : x
  2. Step 2: Convert to fraction form
    558.96/772.20 = 477/x
  3. Step 3: Cross multiply
    558.96x = 772.20 × 477
  4. Step 4: Simplify right side
    558.96x = 368,339.40
  5. Step 5: Solve for x
    x = 368,339.40/558.96
  6. Step 6: Final answer
    x = 658.97

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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.