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Finding the Fourth Proportional to 828,806.10, 1,243,209.15 and 822,901.20

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Solution

The fourth proportional to 828,806.10, 1,243,209.15 and 822,901.20 is: 1,234,351.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,806.10 : 1,243,209.15 = 822,901.20 : x
  2. Step 2: Convert to fraction form
    828,806.10/1,243,209.15 = 822,901.20/x
  3. Step 3: Cross multiply
    828,806.10x = 1,243,209.15 × 822,901.20
  4. Step 4: Simplify right side
    828,806.10x = 1,023,038,301,385.98
  5. Step 5: Solve for x
    x = 1,023,038,301,385.98/828,806.10
  6. Step 6: Final answer
    x = 1,234,351.80

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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.