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Finding the Fourth Proportional to 317.12, 436.32 and 275.56

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Solution

The fourth proportional to 317.12, 436.32 and 275.56 is: 379.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.12 : 436.32 = 275.56 : x
  2. Step 2: Convert to fraction form
    317.12/436.32 = 275.56/x
  3. Step 3: Cross multiply
    317.12x = 436.32 × 275.56
  4. Step 4: Simplify right side
    317.12x = 120,232.34
  5. Step 5: Solve for x
    x = 120,232.34/317.12
  6. Step 6: Final answer
    x = 379.14

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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.