Home / 828,002.20-1,242,003.30-678,411.40

Finding the Fourth Proportional to 828,002.20, 1,242,003.30 and 678,411.40

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Solution

The fourth proportional to 828,002.20, 1,242,003.30 and 678,411.40 is: 1,017,617.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,002.20 : 1,242,003.30 = 678,411.40 : x
  2. Step 2: Convert to fraction form
    828,002.20/1,242,003.30 = 678,411.40/x
  3. Step 3: Cross multiply
    828,002.20x = 1,242,003.30 × 678,411.40
  4. Step 4: Simplify right side
    828,002.20x = 842,589,197,557.62
  5. Step 5: Solve for x
    x = 842,589,197,557.62/828,002.20
  6. Step 6: Final answer
    x = 1,017,617.10

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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.