Home / 1,414.17-2,120.85-489.49

Finding the Fourth Proportional to 1,414.17, 2,120.85 and 489.49

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Solution

The fourth proportional to 1,414.17, 2,120.85 and 489.49 is: 734.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,414.17 : 2,120.85 = 489.49 : x
  2. Step 2: Convert to fraction form
    1,414.17/2,120.85 = 489.49/x
  3. Step 3: Cross multiply
    1,414.17x = 2,120.85 × 489.49
  4. Step 4: Simplify right side
    1,414.17x = 1,038,129.56
  5. Step 5: Solve for x
    x = 1,038,129.56/1,414.17
  6. Step 6: Final answer
    x = 734.09

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1.5x scale

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.