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Finding the Fourth Proportional to 720,791.32, 994,712.78 and 398,522.22

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Solution

The fourth proportional to 720,791.32, 994,712.78 and 398,522.22 is: 549,972.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,791.32 : 994,712.78 = 398,522.22 : x
  2. Step 2: Convert to fraction form
    720,791.32/994,712.78 = 398,522.22/x
  3. Step 3: Cross multiply
    720,791.32x = 994,712.78 × 398,522.22
  4. Step 4: Simplify right side
    720,791.32x = 396,415,146,344.28
  5. Step 5: Solve for x
    x = 396,415,146,344.28/720,791.32
  6. Step 6: Final answer
    x = 549,972.14

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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.