Home / 2,218.19-3,061.09-1,209.89

Finding the Fourth Proportional to 2,218.19, 3,061.09 and 1,209.89

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Solution

The fourth proportional to 2,218.19, 3,061.09 and 1,209.89 is: 1,669.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.19 : 3,061.09 = 1,209.89 : x
  2. Step 2: Convert to fraction form
    2,218.19/3,061.09 = 1,209.89/x
  3. Step 3: Cross multiply
    2,218.19x = 3,061.09 × 1,209.89
  4. Step 4: Simplify right side
    2,218.19x = 3,703,574.13
  5. Step 5: Solve for x
    x = 3,703,574.13/2,218.19
  6. Step 6: Final answer
    x = 1,669.64

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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.