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Finding the Fourth Proportional to 5,732.60, 7,911.30 and 3,215.52

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Solution

The fourth proportional to 5,732.60, 7,911.30 and 3,215.52 is: 4,437.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,732.60 : 7,911.30 = 3,215.52 : x
  2. Step 2: Convert to fraction form
    5,732.60/7,911.30 = 3,215.52/x
  3. Step 3: Cross multiply
    5,732.60x = 7,911.30 × 3,215.52
  4. Step 4: Simplify right side
    5,732.60x = 25,438,943.38
  5. Step 5: Solve for x
    x = 25,438,943.38/5,732.60
  6. Step 6: Final answer
    x = 4,437.60

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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.