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Finding the Fourth Proportional to 580,921.20, 871,381.80 and 206,956.40

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Solution

The fourth proportional to 580,921.20, 871,381.80 and 206,956.40 is: 310,434.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,921.20 : 871,381.80 = 206,956.40 : x
  2. Step 2: Convert to fraction form
    580,921.20/871,381.80 = 206,956.40/x
  3. Step 3: Cross multiply
    580,921.20x = 871,381.80 × 206,956.40
  4. Step 4: Simplify right side
    580,921.20x = 180,338,040,353.52
  5. Step 5: Solve for x
    x = 180,338,040,353.52/580,921.20
  6. Step 6: Final answer
    x = 310,434.60

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Similar ratio
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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.