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Finding the Fourth Proportional to 871,640.56, 1,202,856.72 and 489,659.14

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Solution

The fourth proportional to 871,640.56, 1,202,856.72 and 489,659.14 is: 675,725.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,640.56 : 1,202,856.72 = 489,659.14 : x
  2. Step 2: Convert to fraction form
    871,640.56/1,202,856.72 = 489,659.14/x
  3. Step 3: Cross multiply
    871,640.56x = 1,202,856.72 × 489,659.14
  4. Step 4: Simplify right side
    871,640.56x = 588,989,787,058.42
  5. Step 5: Solve for x
    x = 588,989,787,058.42/871,640.56
  6. Step 6: Final answer
    x = 675,725.54

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1.5x scale

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.