Home / 3,116.40-4,669.38-2,190.30

Finding the Fourth Proportional to 3,116.40, 4,669.38 and 2,190.30

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Solution

The fourth proportional to 3,116.40, 4,669.38 and 2,190.30 is: 3,281.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,116.40 : 4,669.38 = 2,190.30 : x
  2. Step 2: Convert to fraction form
    3,116.40/4,669.38 = 2,190.30/x
  3. Step 3: Cross multiply
    3,116.40x = 4,669.38 × 2,190.30
  4. Step 4: Simplify right side
    3,116.40x = 10,227,332.06
  5. Step 5: Solve for x
    x = 10,227,332.06/3,116.40
  6. Step 6: Final answer
    x = 3,281.78

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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.