Home / 1,207.24-1,662.42-1,120.12

Finding the Fourth Proportional to 1,207.24, 1,662.42 and 1,120.12

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Solution

The fourth proportional to 1,207.24, 1,662.42 and 1,120.12 is: 1,542.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.24 : 1,662.42 = 1,120.12 : x
  2. Step 2: Convert to fraction form
    1,207.24/1,662.42 = 1,120.12/x
  3. Step 3: Cross multiply
    1,207.24x = 1,662.42 × 1,120.12
  4. Step 4: Simplify right side
    1,207.24x = 1,862,109.89
  5. Step 5: Solve for x
    x = 1,862,109.89/1,207.24
  6. Step 6: Final answer
    x = 1,542.45

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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.