Home / 1,418.80-2,128.68-1,258.48

Finding the Fourth Proportional to 1,418.80, 2,128.68 and 1,258.48

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Solution

The fourth proportional to 1,418.80, 2,128.68 and 1,258.48 is: 1,888.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.80 : 2,128.68 = 1,258.48 : x
  2. Step 2: Convert to fraction form
    1,418.80/2,128.68 = 1,258.48/x
  3. Step 3: Cross multiply
    1,418.80x = 2,128.68 × 1,258.48
  4. Step 4: Simplify right side
    1,418.80x = 2,678,901.21
  5. Step 5: Solve for x
    x = 2,678,901.21/1,418.80
  6. Step 6: Final answer
    x = 1,888.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.