Home / 720,200.12-993,791.40-397,891.02

Finding the Fourth Proportional to 720,200.12, 993,791.40 and 397,891.02

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Solution

The fourth proportional to 720,200.12, 993,791.40 and 397,891.02 is: 549,042.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,200.12 : 993,791.40 = 397,891.02 : x
  2. Step 2: Convert to fraction form
    720,200.12/993,791.40 = 397,891.02/x
  3. Step 3: Cross multiply
    720,200.12x = 993,791.40 × 397,891.02
  4. Step 4: Simplify right side
    720,200.12x = 395,420,673,813.23
  5. Step 5: Solve for x
    x = 395,420,673,813.23/720,200.12
  6. Step 6: Final answer
    x = 549,042.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.