Home / 1,083.20-1,626.10-621.30

Finding the Fourth Proportional to 1,083.20, 1,626.10 and 621.30

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Solution

The fourth proportional to 1,083.20, 1,626.10 and 621.30 is: 932.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.20 : 1,626.10 = 621.30 : x
  2. Step 2: Convert to fraction form
    1,083.20/1,626.10 = 621.30/x
  3. Step 3: Cross multiply
    1,083.20x = 1,626.10 × 621.30
  4. Step 4: Simplify right side
    1,083.20x = 1,010,295.93
  5. Step 5: Solve for x
    x = 1,010,295.93/1,083.20
  6. Step 6: Final answer
    x = 932.70

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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.