Home / 2,318.38-3,197.67-1,689.10

Finding the Fourth Proportional to 2,318.38, 3,197.67 and 1,689.10

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Solution

The fourth proportional to 2,318.38, 3,197.67 and 1,689.10 is: 2,329.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,318.38 : 3,197.67 = 1,689.10 : x
  2. Step 2: Convert to fraction form
    2,318.38/3,197.67 = 1,689.10/x
  3. Step 3: Cross multiply
    2,318.38x = 3,197.67 × 1,689.10
  4. Step 4: Simplify right side
    2,318.38x = 5,401,184.40
  5. Step 5: Solve for x
    x = 5,401,184.40/2,318.38
  6. Step 6: Final answer
    x = 2,329.72

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Half scale
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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.