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Finding the Fourth Proportional to 317.28, 436.41 and 270.72

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Solution

The fourth proportional to 317.28, 436.41 and 270.72 is: 372.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.28 : 436.41 = 270.72 : x
  2. Step 2: Convert to fraction form
    317.28/436.41 = 270.72/x
  3. Step 3: Cross multiply
    317.28x = 436.41 × 270.72
  4. Step 4: Simplify right side
    317.28x = 118,144.92
  5. Step 5: Solve for x
    x = 118,144.92/317.28
  6. Step 6: Final answer
    x = 372.37

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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.