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Finding the Fourth Proportional to 338.87, 510.44 and 318.37

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Solution

The fourth proportional to 338.87, 510.44 and 318.37 is: 479.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.87 : 510.44 = 318.37 : x
  2. Step 2: Convert to fraction form
    338.87/510.44 = 318.37/x
  3. Step 3: Cross multiply
    338.87x = 510.44 × 318.37
  4. Step 4: Simplify right side
    338.87x = 162,508.78
  5. Step 5: Solve for x
    x = 162,508.78/338.87
  6. Step 6: Final answer
    x = 479.56

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.