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Finding the Fourth Proportional to 720,758.99, 994,604.73 and 398,449.86

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Solution

The fourth proportional to 720,758.99, 994,604.73 and 398,449.86 is: 549,837.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,758.99 : 994,604.73 = 398,449.86 : x
  2. Step 2: Convert to fraction form
    720,758.99/994,604.73 = 398,449.86/x
  3. Step 3: Cross multiply
    720,758.99x = 994,604.73 × 398,449.86
  4. Step 4: Simplify right side
    720,758.99x = 396,300,115,423.84
  5. Step 5: Solve for x
    x = 396,300,115,423.84/720,758.99
  6. Step 6: Final answer
    x = 549,837.22

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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.