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Finding the Fourth Proportional to 155.88, 214.65 and 131.22

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Solution

The fourth proportional to 155.88, 214.65 and 131.22 is: 180.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.88 : 214.65 = 131.22 : x
  2. Step 2: Convert to fraction form
    155.88/214.65 = 131.22/x
  3. Step 3: Cross multiply
    155.88x = 214.65 × 131.22
  4. Step 4: Simplify right side
    155.88x = 28,166.37
  5. Step 5: Solve for x
    x = 28,166.37/155.88
  6. Step 6: Final answer
    x = 180.69

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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.