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Finding the Fourth Proportional to 918,019.20, 1,377,028.80 and 855,033.60

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Solution

The fourth proportional to 918,019.20, 1,377,028.80 and 855,033.60 is: 1,282,550.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,019.20 : 1,377,028.80 = 855,033.60 : x
  2. Step 2: Convert to fraction form
    918,019.20/1,377,028.80 = 855,033.60/x
  3. Step 3: Cross multiply
    918,019.20x = 1,377,028.80 × 855,033.60
  4. Step 4: Simplify right side
    918,019.20x = 1,177,405,892,167.68
  5. Step 5: Solve for x
    x = 1,177,405,892,167.68/918,019.20
  6. Step 6: Final answer
    x = 1,282,550.40

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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.