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Finding the Fourth Proportional to 886.97, 1,330.21 and 339.11

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Solution

The fourth proportional to 886.97, 1,330.21 and 339.11 is: 508.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.97 : 1,330.21 = 339.11 : x
  2. Step 2: Convert to fraction form
    886.97/1,330.21 = 339.11/x
  3. Step 3: Cross multiply
    886.97x = 1,330.21 × 339.11
  4. Step 4: Simplify right side
    886.97x = 451,089.99
  5. Step 5: Solve for x
    x = 451,089.99/886.97
  6. Step 6: Final answer
    x = 508.57

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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.