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Finding the Fourth Proportional to 5,390.78, 8,071.17 and 2,752.59

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Solution

The fourth proportional to 5,390.78, 8,071.17 and 2,752.59 is: 4,121.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.78 : 8,071.17 = 2,752.59 : x
  2. Step 2: Convert to fraction form
    5,390.78/8,071.17 = 2,752.59/x
  3. Step 3: Cross multiply
    5,390.78x = 8,071.17 × 2,752.59
  4. Step 4: Simplify right side
    5,390.78x = 22,216,621.83
  5. Step 5: Solve for x
    x = 22,216,621.83/5,390.78
  6. Step 6: Final answer
    x = 4,121.23

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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.