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Finding the Fourth Proportional to 257.83, 355.68 and 159.57

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Solution

The fourth proportional to 257.83, 355.68 and 159.57 is: 220.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.83 : 355.68 = 159.57 : x
  2. Step 2: Convert to fraction form
    257.83/355.68 = 159.57/x
  3. Step 3: Cross multiply
    257.83x = 355.68 × 159.57
  4. Step 4: Simplify right side
    257.83x = 56,755.86
  5. Step 5: Solve for x
    x = 56,755.86/257.83
  6. Step 6: Final answer
    x = 220.13

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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.