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Finding the Fourth Proportional to 338.08, 465.76 and 279.68

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Solution

The fourth proportional to 338.08, 465.76 and 279.68 is: 385.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.08 : 465.76 = 279.68 : x
  2. Step 2: Convert to fraction form
    338.08/465.76 = 279.68/x
  3. Step 3: Cross multiply
    338.08x = 465.76 × 279.68
  4. Step 4: Simplify right side
    338.08x = 130,263.76
  5. Step 5: Solve for x
    x = 130,263.76/338.08
  6. Step 6: Final answer
    x = 385.30

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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.