Home / 828,940.80-1,243,411.20-815,116.80

Finding the Fourth Proportional to 828,940.80, 1,243,411.20 and 815,116.80

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Solution

The fourth proportional to 828,940.80, 1,243,411.20 and 815,116.80 is: 1,222,675.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,940.80 : 1,243,411.20 = 815,116.80 : x
  2. Step 2: Convert to fraction form
    828,940.80/1,243,411.20 = 815,116.80/x
  3. Step 3: Cross multiply
    828,940.80x = 1,243,411.20 × 815,116.80
  4. Step 4: Simplify right side
    828,940.80x = 1,013,525,358,428.16
  5. Step 5: Solve for x
    x = 1,013,525,358,428.16/828,940.80
  6. Step 6: Final answer
    x = 1,222,675.20

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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.