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Finding the Fourth Proportional to 178.32, 266.54 and 155.00

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Solution

The fourth proportional to 178.32, 266.54 and 155.00 is: 231.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.32 : 266.54 = 155.00 : x
  2. Step 2: Convert to fraction form
    178.32/266.54 = 155.00/x
  3. Step 3: Cross multiply
    178.32x = 266.54 × 155.00
  4. Step 4: Simplify right side
    178.32x = 41,312.75
  5. Step 5: Solve for x
    x = 41,312.75/178.32
  6. Step 6: Final answer
    x = 231.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.