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Finding the Fourth Proportional to 338.86, 466.95 and 287.02

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Solution

The fourth proportional to 338.86, 466.95 and 287.02 is: 395.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.86 : 466.95 = 287.02 : x
  2. Step 2: Convert to fraction form
    338.86/466.95 = 287.02/x
  3. Step 3: Cross multiply
    338.86x = 466.95 × 287.02
  4. Step 4: Simplify right side
    338.86x = 134,023.99
  5. Step 5: Solve for x
    x = 134,023.99/338.86
  6. Step 6: Final answer
    x = 395.51

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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.