Home / 1,020.36-1,408.10-554.61

Finding the Fourth Proportional to 1,020.36, 1,408.10 and 554.61

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Solution

The fourth proportional to 1,020.36, 1,408.10 and 554.61 is: 765.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.36 : 1,408.10 = 554.61 : x
  2. Step 2: Convert to fraction form
    1,020.36/1,408.10 = 554.61/x
  3. Step 3: Cross multiply
    1,020.36x = 1,408.10 × 554.61
  4. Step 4: Simplify right side
    1,020.36x = 780,943.57
  5. Step 5: Solve for x
    x = 780,943.57/1,020.36
  6. Step 6: Final answer
    x = 765.36

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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.