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Finding the Fourth Proportional to 5,348.28, 7,378.22 and 3,139

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Solution

The fourth proportional to 5,348.28, 7,378.22 and 3,139 is: 4,330.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,348.28 : 7,378.22 = 3,139 : x
  2. Step 2: Convert to fraction form
    5,348.28/7,378.22 = 3,139/x
  3. Step 3: Cross multiply
    5,348.28x = 7,378.22 × 3,139
  4. Step 4: Simplify right side
    5,348.28x = 23,160,232.58
  5. Step 5: Solve for x
    x = 23,160,232.58/5,348.28
  6. Step 6: Final answer
    x = 4,330.41

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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.