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Finding the Fourth Proportional to 720,883.07, 994,778.90 and 398,571.91

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Solution

The fourth proportional to 720,883.07, 994,778.90 and 398,571.91 is: 550,007.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,883.07 : 994,778.90 = 398,571.91 : x
  2. Step 2: Convert to fraction form
    720,883.07/994,778.90 = 398,571.91/x
  3. Step 3: Cross multiply
    720,883.07x = 994,778.90 × 398,571.91
  4. Step 4: Simplify right side
    720,883.07x = 396,490,929,684.08
  5. Step 5: Solve for x
    x = 396,490,929,684.08/720,883.07
  6. Step 6: Final answer
    x = 550,007.27

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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.