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Finding the Fourth Proportional to 2,259.40, 3,387.18 and 871.96

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Solution

The fourth proportional to 2,259.40, 3,387.18 and 871.96 is: 1,307.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,259.40 : 3,387.18 = 871.96 : x
  2. Step 2: Convert to fraction form
    2,259.40/3,387.18 = 871.96/x
  3. Step 3: Cross multiply
    2,259.40x = 3,387.18 × 871.96
  4. Step 4: Simplify right side
    2,259.40x = 2,953,485.47
  5. Step 5: Solve for x
    x = 2,953,485.47/2,259.40
  6. Step 6: Final answer
    x = 1,307.20

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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.