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Finding the Fourth Proportional to 338.99, 508.45 and 122.57

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Solution

The fourth proportional to 338.99, 508.45 and 122.57 is: 183.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.99 : 508.45 = 122.57 : x
  2. Step 2: Convert to fraction form
    338.99/508.45 = 122.57/x
  3. Step 3: Cross multiply
    338.99x = 508.45 × 122.57
  4. Step 4: Simplify right side
    338.99x = 62,320.72
  5. Step 5: Solve for x
    x = 62,320.72/338.99
  6. Step 6: Final answer
    x = 183.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.