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Finding the Fourth Proportional to 720,535.26, 994,390.11 and 398,238.36

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Solution

The fourth proportional to 720,535.26, 994,390.11 and 398,238.36 is: 549,597.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,535.26 : 994,390.11 = 398,238.36 : x
  2. Step 2: Convert to fraction form
    720,535.26/994,390.11 = 398,238.36/x
  3. Step 3: Cross multiply
    720,535.26x = 994,390.11 × 398,238.36
  4. Step 4: Simplify right side
    720,535.26x = 396,004,286,606.62
  5. Step 5: Solve for x
    x = 396,004,286,606.62/720,535.26
  6. Step 6: Final answer
    x = 549,597.37

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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.