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Finding the Fourth Proportional to 720,917.32, 994,825.54 and 398,608.04

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Solution

The fourth proportional to 720,917.32, 994,825.54 and 398,608.04 is: 550,056.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,917.32 : 994,825.54 = 398,608.04 : x
  2. Step 2: Convert to fraction form
    720,917.32/994,825.54 = 398,608.04/x
  3. Step 3: Cross multiply
    720,917.32x = 994,825.54 × 398,608.04
  4. Step 4: Simplify right side
    720,917.32x = 396,545,458,641.34
  5. Step 5: Solve for x
    x = 396,545,458,641.34/720,917.32
  6. Step 6: Final answer
    x = 550,056.78

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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.