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Finding the Fourth Proportional to 178.34, 266.26 and 147.98

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Solution

The fourth proportional to 178.34, 266.26 and 147.98 is: 220.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.34 : 266.26 = 147.98 : x
  2. Step 2: Convert to fraction form
    178.34/266.26 = 147.98/x
  3. Step 3: Cross multiply
    178.34x = 266.26 × 147.98
  4. Step 4: Simplify right side
    178.34x = 39,401.15
  5. Step 5: Solve for x
    x = 39,401.15/178.34
  6. Step 6: Final answer
    x = 220.93

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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.