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Finding the Fourth Proportional to 892.95, 1,339.65 and 276.72

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Solution

The fourth proportional to 892.95, 1,339.65 and 276.72 is: 415.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.95 : 1,339.65 = 276.72 : x
  2. Step 2: Convert to fraction form
    892.95/1,339.65 = 276.72/x
  3. Step 3: Cross multiply
    892.95x = 1,339.65 × 276.72
  4. Step 4: Simplify right side
    892.95x = 370,707.95
  5. Step 5: Solve for x
    x = 370,707.95/892.95
  6. Step 6: Final answer
    x = 415.15

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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.