Home / 2,219.15-3,062.79-1,689.78

Finding the Fourth Proportional to 2,219.15, 3,062.79 and 1,689.78

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Solution

The fourth proportional to 2,219.15, 3,062.79 and 1,689.78 is: 2,332.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.15 : 3,062.79 = 1,689.78 : x
  2. Step 2: Convert to fraction form
    2,219.15/3,062.79 = 1,689.78/x
  3. Step 3: Cross multiply
    2,219.15x = 3,062.79 × 1,689.78
  4. Step 4: Simplify right side
    2,219.15x = 5,175,421.75
  5. Step 5: Solve for x
    x = 5,175,421.75/2,219.15
  6. Step 6: Final answer
    x = 2,332.17

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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.