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Finding the Fourth Proportional to 3,658.78, 5,049.36 and 2,086.97

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Solution

The fourth proportional to 3,658.78, 5,049.36 and 2,086.97 is: 2,880.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,658.78 : 5,049.36 = 2,086.97 : x
  2. Step 2: Convert to fraction form
    3,658.78/5,049.36 = 2,086.97/x
  3. Step 3: Cross multiply
    3,658.78x = 5,049.36 × 2,086.97
  4. Step 4: Simplify right side
    3,658.78x = 10,537,875.46
  5. Step 5: Solve for x
    x = 10,537,875.46/3,658.78
  6. Step 6: Final answer
    x = 2,880.16

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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.