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Finding the Fourth Proportional to 154.78, 233.33 and 130.90

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Solution

The fourth proportional to 154.78, 233.33 and 130.90 is: 197.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.78 : 233.33 = 130.90 : x
  2. Step 2: Convert to fraction form
    154.78/233.33 = 130.90/x
  3. Step 3: Cross multiply
    154.78x = 233.33 × 130.90
  4. Step 4: Simplify right side
    154.78x = 30,542.90
  5. Step 5: Solve for x
    x = 30,542.90/154.78
  6. Step 6: Final answer
    x = 197.33

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.