Home / 1,643.72-2,267.70-1,120.20

Finding the Fourth Proportional to 1,643.72, 2,267.70 and 1,120.20

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Solution

The fourth proportional to 1,643.72, 2,267.70 and 1,120.20 is: 1,545.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.72 : 2,267.70 = 1,120.20 : x
  2. Step 2: Convert to fraction form
    1,643.72/2,267.70 = 1,120.20/x
  3. Step 3: Cross multiply
    1,643.72x = 2,267.70 × 1,120.20
  4. Step 4: Simplify right side
    1,643.72x = 2,540,277.54
  5. Step 5: Solve for x
    x = 2,540,277.54/1,643.72
  6. Step 6: Final answer
    x = 1,545.44

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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.