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Finding the Fourth Proportional to 436.38, 654.63 and 315.55

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Solution

The fourth proportional to 436.38, 654.63 and 315.55 is: 473.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.38 : 654.63 = 315.55 : x
  2. Step 2: Convert to fraction form
    436.38/654.63 = 315.55/x
  3. Step 3: Cross multiply
    436.38x = 654.63 × 315.55
  4. Step 4: Simplify right side
    436.38x = 206,568.50
  5. Step 5: Solve for x
    x = 206,568.50/436.38
  6. Step 6: Final answer
    x = 473.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.