Home / 818,731.80-1,228,097.70-781,990.20

Finding the Fourth Proportional to 818,731.80, 1,228,097.70 and 781,990.20

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Solution

The fourth proportional to 818,731.80, 1,228,097.70 and 781,990.20 is: 1,172,985.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,731.80 : 1,228,097.70 = 781,990.20 : x
  2. Step 2: Convert to fraction form
    818,731.80/1,228,097.70 = 781,990.20/x
  3. Step 3: Cross multiply
    818,731.80x = 1,228,097.70 × 781,990.20
  4. Step 4: Simplify right side
    818,731.80x = 960,360,366,042.54
  5. Step 5: Solve for x
    x = 960,360,366,042.54/818,731.80
  6. Step 6: Final answer
    x = 1,172,985.30

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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.