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Finding the Fourth Proportional to 155.80, 233.68 and 74.64

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Solution

The fourth proportional to 155.80, 233.68 and 74.64 is: 111.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.80 : 233.68 = 74.64 : x
  2. Step 2: Convert to fraction form
    155.80/233.68 = 74.64/x
  3. Step 3: Cross multiply
    155.80x = 233.68 × 74.64
  4. Step 4: Simplify right side
    155.80x = 17,441.88
  5. Step 5: Solve for x
    x = 17,441.88/155.80
  6. Step 6: Final answer
    x = 111.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.