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Finding the Fourth Proportional to 868,561.78, 1,198,608.69 and 486,591.70

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Solution

The fourth proportional to 868,561.78, 1,198,608.69 and 486,591.70 is: 671,492.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,561.78 : 1,198,608.69 = 486,591.70 : x
  2. Step 2: Convert to fraction form
    868,561.78/1,198,608.69 = 486,591.70/x
  3. Step 3: Cross multiply
    868,561.78x = 1,198,608.69 × 486,591.70
  4. Step 4: Simplify right side
    868,561.78x = 583,233,040,101.87
  5. Step 5: Solve for x
    x = 583,233,040,101.87/868,561.78
  6. Step 6: Final answer
    x = 671,492.87

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Double scale
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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.