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Finding the Fourth Proportional to 213.55, 294.57 and 130.66

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Solution

The fourth proportional to 213.55, 294.57 and 130.66 is: 180.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.55 : 294.57 = 130.66 : x
  2. Step 2: Convert to fraction form
    213.55/294.57 = 130.66/x
  3. Step 3: Cross multiply
    213.55x = 294.57 × 130.66
  4. Step 4: Simplify right side
    213.55x = 38,488.52
  5. Step 5: Solve for x
    x = 38,488.52/213.55
  6. Step 6: Final answer
    x = 180.23

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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.