Home / 1,617.24-2,231.26-987.54

Finding the Fourth Proportional to 1,617.24, 2,231.26 and 987.54

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Solution

The fourth proportional to 1,617.24, 2,231.26 and 987.54 is: 1,362.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.24 : 2,231.26 = 987.54 : x
  2. Step 2: Convert to fraction form
    1,617.24/2,231.26 = 987.54/x
  3. Step 3: Cross multiply
    1,617.24x = 2,231.26 × 987.54
  4. Step 4: Simplify right side
    1,617.24x = 2,203,458.50
  5. Step 5: Solve for x
    x = 2,203,458.50/1,617.24
  6. Step 6: Final answer
    x = 1,362.48

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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.