Home / 3,140.40-4,332.08-2,145.68

Finding the Fourth Proportional to 3,140.40, 4,332.08 and 2,145.68

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Solution

The fourth proportional to 3,140.40, 4,332.08 and 2,145.68 is: 2,959.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.40 : 4,332.08 = 2,145.68 : x
  2. Step 2: Convert to fraction form
    3,140.40/4,332.08 = 2,145.68/x
  3. Step 3: Cross multiply
    3,140.40x = 4,332.08 × 2,145.68
  4. Step 4: Simplify right side
    3,140.40x = 9,295,257.41
  5. Step 5: Solve for x
    x = 9,295,257.41/3,140.40
  6. Step 6: Final answer
    x = 2,959.90

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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.