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Finding the Fourth Proportional to 442.31, 610.35 and 255.77

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Solution

The fourth proportional to 442.31, 610.35 and 255.77 is: 352.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.31 : 610.35 = 255.77 : x
  2. Step 2: Convert to fraction form
    442.31/610.35 = 255.77/x
  3. Step 3: Cross multiply
    442.31x = 610.35 × 255.77
  4. Step 4: Simplify right side
    442.31x = 156,106.17
  5. Step 5: Solve for x
    x = 156,106.17/442.31
  6. Step 6: Final answer
    x = 352.94

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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.