Home / 1,151,998.80-1,727,998.20-678,440.40

Finding the Fourth Proportional to 1,151,998.80, 1,727,998.20 and 678,440.40

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Solution

The fourth proportional to 1,151,998.80, 1,727,998.20 and 678,440.40 is: 1,017,660.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151,998.80 : 1,727,998.20 = 678,440.40 : x
  2. Step 2: Convert to fraction form
    1,151,998.80/1,727,998.20 = 678,440.40/x
  3. Step 3: Cross multiply
    1,151,998.80x = 1,727,998.20 × 678,440.40
  4. Step 4: Simplify right side
    1,151,998.80x = 1,172,343,790,007.28
  5. Step 5: Solve for x
    x = 1,172,343,790,007.28/1,151,998.80
  6. Step 6: Final answer
    x = 1,017,660.60

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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.