Home / 828,005.20-1,242,007.80-678,414.40

Finding the Fourth Proportional to 828,005.20, 1,242,007.80 and 678,414.40

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Solution

The fourth proportional to 828,005.20, 1,242,007.80 and 678,414.40 is: 1,017,621.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,005.20 : 1,242,007.80 = 678,414.40 : x
  2. Step 2: Convert to fraction form
    828,005.20/1,242,007.80 = 678,414.40/x
  3. Step 3: Cross multiply
    828,005.20x = 1,242,007.80 × 678,414.40
  4. Step 4: Simplify right side
    828,005.20x = 842,595,976,432.32
  5. Step 5: Solve for x
    x = 842,595,976,432.32/828,005.20
  6. Step 6: Final answer
    x = 1,017,621.60

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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.