Home / 918,105.20-1,377,449.40-412,470.80

Finding the Fourth Proportional to 918,105.20, 1,377,449.40 and 412,470.80

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Solution

The fourth proportional to 918,105.20, 1,377,449.40 and 412,470.80 is: 618,837.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,105.20 : 1,377,449.40 = 412,470.80 : x
  2. Step 2: Convert to fraction form
    918,105.20/1,377,449.40 = 412,470.80/x
  3. Step 3: Cross multiply
    918,105.20x = 1,377,449.40 × 412,470.80
  4. Step 4: Simplify right side
    918,105.20x = 568,157,655,977.52
  5. Step 5: Solve for x
    x = 568,157,655,977.52/918,105.20
  6. Step 6: Final answer
    x = 618,837.21

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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.