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Finding the Fourth Proportional to 5,420.47, 7,479 and 3,182.26

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Solution

The fourth proportional to 5,420.47, 7,479 and 3,182.26 is: 4,390.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.47 : 7,479 = 3,182.26 : x
  2. Step 2: Convert to fraction form
    5,420.47/7,479 = 3,182.26/x
  3. Step 3: Cross multiply
    5,420.47x = 7,479 × 3,182.26
  4. Step 4: Simplify right side
    5,420.47x = 23,800,122.54
  5. Step 5: Solve for x
    x = 23,800,122.54/5,420.47
  6. Step 6: Final answer
    x = 4,390.79

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1.5x scale

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.