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Finding the Fourth Proportional to 2,871.12, 4,305.72 and 922.86

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Solution

The fourth proportional to 2,871.12, 4,305.72 and 922.86 is: 1,383.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,871.12 : 4,305.72 = 922.86 : x
  2. Step 2: Convert to fraction form
    2,871.12/4,305.72 = 922.86/x
  3. Step 3: Cross multiply
    2,871.12x = 4,305.72 × 922.86
  4. Step 4: Simplify right side
    2,871.12x = 3,973,576.76
  5. Step 5: Solve for x
    x = 3,973,576.76/2,871.12
  6. Step 6: Final answer
    x = 1,383.98

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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.