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Finding the Fourth Proportional to 317.27, 436.06 and 280.21

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Solution

The fourth proportional to 317.27, 436.06 and 280.21 is: 385.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.27 : 436.06 = 280.21 : x
  2. Step 2: Convert to fraction form
    317.27/436.06 = 280.21/x
  3. Step 3: Cross multiply
    317.27x = 436.06 × 280.21
  4. Step 4: Simplify right side
    317.27x = 122,188.37
  5. Step 5: Solve for x
    x = 122,188.37/317.27
  6. Step 6: Final answer
    x = 385.12

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.