Home / 1,227.40-1,689.90-1,030.48

Finding the Fourth Proportional to 1,227.40, 1,689.90 and 1,030.48

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Solution

The fourth proportional to 1,227.40, 1,689.90 and 1,030.48 is: 1,418.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227.40 : 1,689.90 = 1,030.48 : x
  2. Step 2: Convert to fraction form
    1,227.40/1,689.90 = 1,030.48/x
  3. Step 3: Cross multiply
    1,227.40x = 1,689.90 × 1,030.48
  4. Step 4: Simplify right side
    1,227.40x = 1,741,408.15
  5. Step 5: Solve for x
    x = 1,741,408.15/1,227.40
  6. Step 6: Final answer
    x = 1,418.78

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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.