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Finding the Fourth Proportional to 720,791.82, 994,713.48 and 398,522.72

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Solution

The fourth proportional to 720,791.82, 994,713.48 and 398,522.72 is: 549,972.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,791.82 : 994,713.48 = 398,522.72 : x
  2. Step 2: Convert to fraction form
    720,791.82/994,713.48 = 398,522.72/x
  3. Step 3: Cross multiply
    720,791.82x = 994,713.48 × 398,522.72
  4. Step 4: Simplify right side
    720,791.82x = 396,415,921,670.27
  5. Step 5: Solve for x
    x = 396,415,921,670.27/720,791.82
  6. Step 6: Final answer
    x = 549,972.84

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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.