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Finding the Fourth Proportional to 316.55, 436.85 and 176.70

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Solution

The fourth proportional to 316.55, 436.85 and 176.70 is: 243.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.55 : 436.85 = 176.70 : x
  2. Step 2: Convert to fraction form
    316.55/436.85 = 176.70/x
  3. Step 3: Cross multiply
    316.55x = 436.85 × 176.70
  4. Step 4: Simplify right side
    316.55x = 77,190.02
  5. Step 5: Solve for x
    x = 77,190.02/316.55
  6. Step 6: Final answer
    x = 243.85

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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.