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Finding the Fourth Proportional to 720,893.59, 994,790.41 and 398,578.39

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Solution

The fourth proportional to 720,893.59, 994,790.41 and 398,578.39 is: 550,014.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,893.59 : 994,790.41 = 398,578.39 : x
  2. Step 2: Convert to fraction form
    720,893.59/994,790.41 = 398,578.39/x
  3. Step 3: Cross multiply
    720,893.59x = 994,790.41 × 398,578.39
  4. Step 4: Simplify right side
    720,893.59x = 396,501,960,005.24
  5. Step 5: Solve for x
    x = 396,501,960,005.24/720,893.59
  6. Step 6: Final answer
    x = 550,014.55

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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.