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Finding the Fourth Proportional to 559.66, 772.33 and 385.31

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Solution

The fourth proportional to 559.66, 772.33 and 385.31 is: 531.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.66 : 772.33 = 385.31 : x
  2. Step 2: Convert to fraction form
    559.66/772.33 = 385.31/x
  3. Step 3: Cross multiply
    559.66x = 772.33 × 385.31
  4. Step 4: Simplify right side
    559.66x = 297,580.68
  5. Step 5: Solve for x
    x = 297,580.68/559.66
  6. Step 6: Final answer
    x = 531.72

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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.