Home / 1,029.90-1,550.46-939.18

Finding the Fourth Proportional to 1,029.90, 1,550.46 and 939.18

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Solution

The fourth proportional to 1,029.90, 1,550.46 and 939.18 is: 1,413.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.90 : 1,550.46 = 939.18 : x
  2. Step 2: Convert to fraction form
    1,029.90/1,550.46 = 939.18/x
  3. Step 3: Cross multiply
    1,029.90x = 1,550.46 × 939.18
  4. Step 4: Simplify right side
    1,029.90x = 1,456,161.02
  5. Step 5: Solve for x
    x = 1,456,161.02/1,029.90
  6. Step 6: Final answer
    x = 1,413.89

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.