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Finding the Fourth Proportional to 2,432.23, 3,647.45 and 871.81

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Solution

The fourth proportional to 2,432.23, 3,647.45 and 871.81 is: 1,307.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,432.23 : 3,647.45 = 871.81 : x
  2. Step 2: Convert to fraction form
    2,432.23/3,647.45 = 871.81/x
  3. Step 3: Cross multiply
    2,432.23x = 3,647.45 × 871.81
  4. Step 4: Simplify right side
    2,432.23x = 3,179,883.38
  5. Step 5: Solve for x
    x = 3,179,883.38/2,432.23
  6. Step 6: Final answer
    x = 1,307.39

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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.