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Finding the Fourth Proportional to 886.86, 1,329.84 and 338.70

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Solution

The fourth proportional to 886.86, 1,329.84 and 338.70 is: 507.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.86 : 1,329.84 = 338.70 : x
  2. Step 2: Convert to fraction form
    886.86/1,329.84 = 338.70/x
  3. Step 3: Cross multiply
    886.86x = 1,329.84 × 338.70
  4. Step 4: Simplify right side
    886.86x = 450,416.81
  5. Step 5: Solve for x
    x = 450,416.81/886.86
  6. Step 6: Final answer
    x = 507.88

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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.