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Finding the Fourth Proportional to 518,227.62, 715,212.02 and 288,805.86

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Solution

The fourth proportional to 518,227.62, 715,212.02 and 288,805.86 is: 398,584.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,227.62 : 715,212.02 = 288,805.86 : x
  2. Step 2: Convert to fraction form
    518,227.62/715,212.02 = 288,805.86/x
  3. Step 3: Cross multiply
    518,227.62x = 715,212.02 × 288,805.86
  4. Step 4: Simplify right side
    518,227.62x = 206,557,422,518.44
  5. Step 5: Solve for x
    x = 206,557,422,518.44/518,227.62
  6. Step 6: Final answer
    x = 398,584.36

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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.