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Finding the Fourth Proportional to 6,490.38, 8,956.98 and 3,658.92

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Solution

The fourth proportional to 6,490.38, 8,956.98 and 3,658.92 is: 5,049.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,490.38 : 8,956.98 = 3,658.92 : x
  2. Step 2: Convert to fraction form
    6,490.38/8,956.98 = 3,658.92/x
  3. Step 3: Cross multiply
    6,490.38x = 8,956.98 × 3,658.92
  4. Step 4: Simplify right side
    6,490.38x = 32,772,873.26
  5. Step 5: Solve for x
    x = 32,772,873.26/6,490.38
  6. Step 6: Final answer
    x = 5,049.45

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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.