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Finding the Fourth Proportional to 892.95, 1,339.28 and 307.86

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Solution

The fourth proportional to 892.95, 1,339.28 and 307.86 is: 461.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.95 : 1,339.28 = 307.86 : x
  2. Step 2: Convert to fraction form
    892.95/1,339.28 = 307.86/x
  3. Step 3: Cross multiply
    892.95x = 1,339.28 × 307.86
  4. Step 4: Simplify right side
    892.95x = 412,310.74
  5. Step 5: Solve for x
    x = 412,310.74/892.95
  6. Step 6: Final answer
    x = 461.74

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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.