Home / 2,005.40-2,767.54-1,121.20

Finding the Fourth Proportional to 2,005.40, 2,767.54 and 1,121.20

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Solution

The fourth proportional to 2,005.40, 2,767.54 and 1,121.20 is: 1,547.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,005.40 : 2,767.54 = 1,121.20 : x
  2. Step 2: Convert to fraction form
    2,005.40/2,767.54 = 1,121.20/x
  3. Step 3: Cross multiply
    2,005.40x = 2,767.54 × 1,121.20
  4. Step 4: Simplify right side
    2,005.40x = 3,102,965.85
  5. Step 5: Solve for x
    x = 3,102,965.85/2,005.40
  6. Step 6: Final answer
    x = 1,547.31

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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.