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Finding the Fourth Proportional to 214.78, 296.40 and 116.54

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Solution

The fourth proportional to 214.78, 296.40 and 116.54 is: 160.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.78 : 296.40 = 116.54 : x
  2. Step 2: Convert to fraction form
    214.78/296.40 = 116.54/x
  3. Step 3: Cross multiply
    214.78x = 296.40 × 116.54
  4. Step 4: Simplify right side
    214.78x = 34,542.03
  5. Step 5: Solve for x
    x = 34,542.03/214.78
  6. Step 6: Final answer
    x = 160.82

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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.