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Finding the Fourth Proportional to 876.24, 1,319.76 and 854.37

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Solution

The fourth proportional to 876.24, 1,319.76 and 854.37 is: 1,286.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.24 : 1,319.76 = 854.37 : x
  2. Step 2: Convert to fraction form
    876.24/1,319.76 = 854.37/x
  3. Step 3: Cross multiply
    876.24x = 1,319.76 × 854.37
  4. Step 4: Simplify right side
    876.24x = 1,127,563.35
  5. Step 5: Solve for x
    x = 1,127,563.35/876.24
  6. Step 6: Final answer
    x = 1,286.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.