Home / 816,811.80-1,225,217.70-780,070.20

Finding the Fourth Proportional to 816,811.80, 1,225,217.70 and 780,070.20

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Solution

The fourth proportional to 816,811.80, 1,225,217.70 and 780,070.20 is: 1,170,105.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,811.80 : 1,225,217.70 = 780,070.20 : x
  2. Step 2: Convert to fraction form
    816,811.80/1,225,217.70 = 780,070.20/x
  3. Step 3: Cross multiply
    816,811.80x = 1,225,217.70 × 780,070.20
  4. Step 4: Simplify right side
    816,811.80x = 955,755,816,282.54
  5. Step 5: Solve for x
    x = 955,755,816,282.54/816,811.80
  6. Step 6: Final answer
    x = 1,170,105.30

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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.