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Finding the Fourth Proportional to 255.86, 353.12 and 156.29

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Solution

The fourth proportional to 255.86, 353.12 and 156.29 is: 215.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.86 : 353.12 = 156.29 : x
  2. Step 2: Convert to fraction form
    255.86/353.12 = 156.29/x
  3. Step 3: Cross multiply
    255.86x = 353.12 × 156.29
  4. Step 4: Simplify right side
    255.86x = 55,188.34
  5. Step 5: Solve for x
    x = 55,188.34/255.86
  6. Step 6: Final answer
    x = 215.70

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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.