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Finding the Fourth Proportional to 720,565.98, 994,385.01 and 393,879.48

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Solution

The fourth proportional to 720,565.98, 994,385.01 and 393,879.48 is: 543,555.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,565.98 : 994,385.01 = 393,879.48 : x
  2. Step 2: Convert to fraction form
    720,565.98/994,385.01 = 393,879.48/x
  3. Step 3: Cross multiply
    720,565.98x = 994,385.01 × 393,879.48
  4. Step 4: Simplify right side
    720,565.98x = 391,667,850,658.60
  5. Step 5: Solve for x
    x = 391,667,850,658.60/720,565.98
  6. Step 6: Final answer
    x = 543,555.85

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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.