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Finding the Fourth Proportional to 229.48, 316.43 and 155.67

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Solution

The fourth proportional to 229.48, 316.43 and 155.67 is: 214.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.48 : 316.43 = 155.67 : x
  2. Step 2: Convert to fraction form
    229.48/316.43 = 155.67/x
  3. Step 3: Cross multiply
    229.48x = 316.43 × 155.67
  4. Step 4: Simplify right side
    229.48x = 49,259.49
  5. Step 5: Solve for x
    x = 49,259.49/229.48
  6. Step 6: Final answer
    x = 214.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.