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Finding the Fourth Proportional to 578,249.80, 866,499.90 and 489,020.20

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Solution

The fourth proportional to 578,249.80, 866,499.90 and 489,020.20 is: 732,790.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,249.80 : 866,499.90 = 489,020.20 : x
  2. Step 2: Convert to fraction form
    578,249.80/866,499.90 = 489,020.20/x
  3. Step 3: Cross multiply
    578,249.80x = 866,499.90 × 489,020.20
  4. Step 4: Simplify right side
    578,249.80x = 423,735,954,397.98
  5. Step 5: Solve for x
    x = 423,735,954,397.98/578,249.80
  6. Step 6: Final answer
    x = 732,790.49

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Double scale
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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.