Home / 1,689.39-2,330.69-1,099.71

Finding the Fourth Proportional to 1,689.39, 2,330.69 and 1,099.71

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Solution

The fourth proportional to 1,689.39, 2,330.69 and 1,099.71 is: 1,517.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.39 : 2,330.69 = 1,099.71 : x
  2. Step 2: Convert to fraction form
    1,689.39/2,330.69 = 1,099.71/x
  3. Step 3: Cross multiply
    1,689.39x = 2,330.69 × 1,099.71
  4. Step 4: Simplify right side
    1,689.39x = 2,563,077.60
  5. Step 5: Solve for x
    x = 2,563,077.60/1,689.39
  6. Step 6: Final answer
    x = 1,517.16

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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.