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Finding the Fourth Proportional to 858,900.60, 1,288,350.90 and 297,991.80

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Solution

The fourth proportional to 858,900.60, 1,288,350.90 and 297,991.80 is: 446,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,900.60 : 1,288,350.90 = 297,991.80 : x
  2. Step 2: Convert to fraction form
    858,900.60/1,288,350.90 = 297,991.80/x
  3. Step 3: Cross multiply
    858,900.60x = 1,288,350.90 × 297,991.80
  4. Step 4: Simplify right side
    858,900.60x = 383,918,003,722.62
  5. Step 5: Solve for x
    x = 383,918,003,722.62/858,900.60
  6. Step 6: Final answer
    x = 446,987.70

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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.