Home / 811,584.80-1,218,121.20-412,503.20

Finding the Fourth Proportional to 811,584.80, 1,218,121.20 and 412,503.20

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Solution

The fourth proportional to 811,584.80, 1,218,121.20 and 412,503.20 is: 619,132.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,584.80 : 1,218,121.20 = 412,503.20 : x
  2. Step 2: Convert to fraction form
    811,584.80/1,218,121.20 = 412,503.20/x
  3. Step 3: Cross multiply
    811,584.80x = 1,218,121.20 × 412,503.20
  4. Step 4: Simplify right side
    811,584.80x = 502,478,892,987.84
  5. Step 5: Solve for x
    x = 502,478,892,987.84/811,584.80
  6. Step 6: Final answer
    x = 619,132.95

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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.