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Finding the Fourth Proportional to 3,658.92, 5,048.64 and 2,166.90

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Solution

The fourth proportional to 3,658.92, 5,048.64 and 2,166.90 is: 2,989.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,658.92 : 5,048.64 = 2,166.90 : x
  2. Step 2: Convert to fraction form
    3,658.92/5,048.64 = 2,166.90/x
  3. Step 3: Cross multiply
    3,658.92x = 5,048.64 × 2,166.90
  4. Step 4: Simplify right side
    3,658.92x = 10,939,898.02
  5. Step 5: Solve for x
    x = 10,939,898.02/3,658.92
  6. Step 6: Final answer
    x = 2,989.93

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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.