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Finding the Fourth Proportional to 317.44, 438.42 and 275.77

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Solution

The fourth proportional to 317.44, 438.42 and 275.77 is: 380.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.44 : 438.42 = 275.77 : x
  2. Step 2: Convert to fraction form
    317.44/438.42 = 275.77/x
  3. Step 3: Cross multiply
    317.44x = 438.42 × 275.77
  4. Step 4: Simplify right side
    317.44x = 120,903.08
  5. Step 5: Solve for x
    x = 120,903.08/317.44
  6. Step 6: Final answer
    x = 380.87

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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.