Home / 2,140.17-3,210.21-985.92

Finding the Fourth Proportional to 2,140.17, 3,210.21 and 985.92

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Solution

The fourth proportional to 2,140.17, 3,210.21 and 985.92 is: 1,478.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.17 : 3,210.21 = 985.92 : x
  2. Step 2: Convert to fraction form
    2,140.17/3,210.21 = 985.92/x
  3. Step 3: Cross multiply
    2,140.17x = 3,210.21 × 985.92
  4. Step 4: Simplify right side
    2,140.17x = 3,165,007.78
  5. Step 5: Solve for x
    x = 3,165,007.78/2,140.17
  6. Step 6: Final answer
    x = 1,478.86

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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.