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Finding the Fourth Proportional to 6,288.68, 8,678.42 and 3,932.20

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Solution

The fourth proportional to 6,288.68, 8,678.42 and 3,932.20 is: 5,426.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,288.68 : 8,678.42 = 3,932.20 : x
  2. Step 2: Convert to fraction form
    6,288.68/8,678.42 = 3,932.20/x
  3. Step 3: Cross multiply
    6,288.68x = 8,678.42 × 3,932.20
  4. Step 4: Simplify right side
    6,288.68x = 34,125,283.12
  5. Step 5: Solve for x
    x = 34,125,283.12/6,288.68
  6. Step 6: Final answer
    x = 5,426.46

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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.