Home / 1,540.92-2,128.23-1,407.81

Finding the Fourth Proportional to 1,540.92, 2,128.23 and 1,407.81

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Solution

The fourth proportional to 1,540.92, 2,128.23 and 1,407.81 is: 1,944.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.92 : 2,128.23 = 1,407.81 : x
  2. Step 2: Convert to fraction form
    1,540.92/2,128.23 = 1,407.81/x
  3. Step 3: Cross multiply
    1,540.92x = 2,128.23 × 1,407.81
  4. Step 4: Simplify right side
    1,540.92x = 2,996,143.48
  5. Step 5: Solve for x
    x = 2,996,143.48/1,540.92
  6. Step 6: Final answer
    x = 1,944.39

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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.