Home / 1,414.24-2,121.42-489.35

Finding the Fourth Proportional to 1,414.24, 2,121.42 and 489.35

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Solution

The fourth proportional to 1,414.24, 2,121.42 and 489.35 is: 734.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,414.24 : 2,121.42 = 489.35 : x
  2. Step 2: Convert to fraction form
    1,414.24/2,121.42 = 489.35/x
  3. Step 3: Cross multiply
    1,414.24x = 2,121.42 × 489.35
  4. Step 4: Simplify right side
    1,414.24x = 1,038,116.88
  5. Step 5: Solve for x
    x = 1,038,116.88/1,414.24
  6. Step 6: Final answer
    x = 734.05

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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.