Home / 858,806.20-1,288,209.30-498,607.30

Finding the Fourth Proportional to 858,806.20, 1,288,209.30 and 498,607.30

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Solution

The fourth proportional to 858,806.20, 1,288,209.30 and 498,607.30 is: 747,910.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,806.20 : 1,288,209.30 = 498,607.30 : x
  2. Step 2: Convert to fraction form
    858,806.20/1,288,209.30 = 498,607.30/x
  3. Step 3: Cross multiply
    858,806.20x = 1,288,209.30 × 498,607.30
  4. Step 4: Simplify right side
    858,806.20x = 642,310,560,907.89
  5. Step 5: Solve for x
    x = 642,310,560,907.89/858,806.20
  6. Step 6: Final answer
    x = 747,910.95

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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.