Home / 711,979.80-1,067,969.70-664,978.20

Finding the Fourth Proportional to 711,979.80, 1,067,969.70 and 664,978.20

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Solution

The fourth proportional to 711,979.80, 1,067,969.70 and 664,978.20 is: 997,467.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,979.80 : 1,067,969.70 = 664,978.20 : x
  2. Step 2: Convert to fraction form
    711,979.80/1,067,969.70 = 664,978.20/x
  3. Step 3: Cross multiply
    711,979.80x = 1,067,969.70 × 664,978.20
  4. Step 4: Simplify right side
    711,979.80x = 710,176,568,760.54
  5. Step 5: Solve for x
    x = 710,176,568,760.54/711,979.80
  6. Step 6: Final answer
    x = 997,467.30

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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.