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Finding the Fourth Proportional to 254.15, 350.71 and 155.89

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Solution

The fourth proportional to 254.15, 350.71 and 155.89 is: 215.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.15 : 350.71 = 155.89 : x
  2. Step 2: Convert to fraction form
    254.15/350.71 = 155.89/x
  3. Step 3: Cross multiply
    254.15x = 350.71 × 155.89
  4. Step 4: Simplify right side
    254.15x = 54,672.18
  5. Step 5: Solve for x
    x = 54,672.18/254.15
  6. Step 6: Final answer
    x = 215.12

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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.