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Finding the Fourth Proportional to 316.55, 436.80 and 233.70

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Solution

The fourth proportional to 316.55, 436.80 and 233.70 is: 322.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.55 : 436.80 = 233.70 : x
  2. Step 2: Convert to fraction form
    316.55/436.80 = 233.70/x
  3. Step 3: Cross multiply
    316.55x = 436.80 × 233.70
  4. Step 4: Simplify right side
    316.55x = 102,080.16
  5. Step 5: Solve for x
    x = 102,080.16/316.55
  6. Step 6: Final answer
    x = 322.48

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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.