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Finding the Fourth Proportional to 720,565.09, 994,362.48 and 393,863.43

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Solution

The fourth proportional to 720,565.09, 994,362.48 and 393,863.43 is: 543,522.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,565.09 : 994,362.48 = 393,863.43 : x
  2. Step 2: Convert to fraction form
    720,565.09/994,362.48 = 393,863.43/x
  3. Step 3: Cross multiply
    720,565.09x = 994,362.48 × 393,863.43
  4. Step 4: Simplify right side
    720,565.09x = 391,643,020,764.97
  5. Step 5: Solve for x
    x = 391,643,020,764.97/720,565.09
  6. Step 6: Final answer
    x = 543,522.06

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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.