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Finding the Fourth Proportional to 720,884.22, 994,780.08 and 398,574.96

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Solution

The fourth proportional to 720,884.22, 994,780.08 and 398,574.96 is: 550,011.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,884.22 : 994,780.08 = 398,574.96 : x
  2. Step 2: Convert to fraction form
    720,884.22/994,780.08 = 398,574.96/x
  3. Step 3: Cross multiply
    720,884.22x = 994,780.08 × 398,574.96
  4. Step 4: Simplify right side
    720,884.22x = 396,494,430,594.80
  5. Step 5: Solve for x
    x = 396,494,430,594.80/720,884.22
  6. Step 6: Final answer
    x = 550,011.25

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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.