Home / 2,007.18-2,769.80-1,221.08

Finding the Fourth Proportional to 2,007.18, 2,769.80 and 1,221.08

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Solution

The fourth proportional to 2,007.18, 2,769.80 and 1,221.08 is: 1,685.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,007.18 : 2,769.80 = 1,221.08 : x
  2. Step 2: Convert to fraction form
    2,007.18/2,769.80 = 1,221.08/x
  3. Step 3: Cross multiply
    2,007.18x = 2,769.80 × 1,221.08
  4. Step 4: Simplify right side
    2,007.18x = 3,382,127.43
  5. Step 5: Solve for x
    x = 3,382,127.43/2,007.18
  6. Step 6: Final answer
    x = 1,685.01

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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.