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Finding the Fourth Proportional to 316.16, 436.32 and 176.31

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Solution

The fourth proportional to 316.16, 436.32 and 176.31 is: 243.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.16 : 436.32 = 176.31 : x
  2. Step 2: Convert to fraction form
    316.16/436.32 = 176.31/x
  3. Step 3: Cross multiply
    316.16x = 436.32 × 176.31
  4. Step 4: Simplify right side
    316.16x = 76,927.58
  5. Step 5: Solve for x
    x = 76,927.58/316.16
  6. Step 6: Final answer
    x = 243.32

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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.