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Finding the Fourth Proportional to 2,660.63, 3,988.61 and 1,099.65

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Solution

The fourth proportional to 2,660.63, 3,988.61 and 1,099.65 is: 1,648.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.63 : 3,988.61 = 1,099.65 : x
  2. Step 2: Convert to fraction form
    2,660.63/3,988.61 = 1,099.65/x
  3. Step 3: Cross multiply
    2,660.63x = 3,988.61 × 1,099.65
  4. Step 4: Simplify right side
    2,660.63x = 4,386,077.74
  5. Step 5: Solve for x
    x = 4,386,077.74/2,660.63
  6. Step 6: Final answer
    x = 1,648.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.