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Finding the Fourth Proportional to 316.25, 436.40 and 183.45

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Solution

The fourth proportional to 316.25, 436.40 and 183.45 is: 253.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.25 : 436.40 = 183.45 : x
  2. Step 2: Convert to fraction form
    316.25/436.40 = 183.45/x
  3. Step 3: Cross multiply
    316.25x = 436.40 × 183.45
  4. Step 4: Simplify right side
    316.25x = 80,057.56
  5. Step 5: Solve for x
    x = 80,057.56/316.25
  6. Step 6: Final answer
    x = 253.14

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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.