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Finding the Fourth Proportional to 338.35, 466.85 and 288.74

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Solution

The fourth proportional to 338.35, 466.85 and 288.74 is: 398.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.35 : 466.85 = 288.74 : x
  2. Step 2: Convert to fraction form
    338.35/466.85 = 288.74/x
  3. Step 3: Cross multiply
    338.35x = 466.85 × 288.74
  4. Step 4: Simplify right side
    338.35x = 134,798.27
  5. Step 5: Solve for x
    x = 134,798.27/338.35
  6. Step 6: Final answer
    x = 398.40

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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.