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Finding the Fourth Proportional to 316.15, 436.25 and 176.23

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Solution

The fourth proportional to 316.15, 436.25 and 176.23 is: 243.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.15 : 436.25 = 176.23 : x
  2. Step 2: Convert to fraction form
    316.15/436.25 = 176.23/x
  3. Step 3: Cross multiply
    316.15x = 436.25 × 176.23
  4. Step 4: Simplify right side
    316.15x = 76,881.32
  5. Step 5: Solve for x
    x = 76,881.32/316.15
  6. Step 6: Final answer
    x = 243.18

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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.