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Finding the Fourth Proportional to 876.96, 1,209.72 and 610.98

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Solution

The fourth proportional to 876.96, 1,209.72 and 610.98 is: 842.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.96 : 1,209.72 = 610.98 : x
  2. Step 2: Convert to fraction form
    876.96/1,209.72 = 610.98/x
  3. Step 3: Cross multiply
    876.96x = 1,209.72 × 610.98
  4. Step 4: Simplify right side
    876.96x = 739,105.62
  5. Step 5: Solve for x
    x = 739,105.62/876.96
  6. Step 6: Final answer
    x = 842.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.