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Finding the Fourth Proportional to 176.80, 266.59 and 155.20

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Solution

The fourth proportional to 176.80, 266.59 and 155.20 is: 234.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.80 : 266.59 = 155.20 : x
  2. Step 2: Convert to fraction form
    176.80/266.59 = 155.20/x
  3. Step 3: Cross multiply
    176.80x = 266.59 × 155.20
  4. Step 4: Simplify right side
    176.80x = 41,374.77
  5. Step 5: Solve for x
    x = 41,374.77/176.80
  6. Step 6: Final answer
    x = 234.02

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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.