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Finding the Fourth Proportional to 518,481.41, 715,479.48 and 289,063.89

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Solution

The fourth proportional to 518,481.41, 715,479.48 and 289,063.89 is: 398,894.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,481.41 : 715,479.48 = 289,063.89 : x
  2. Step 2: Convert to fraction form
    518,481.41/715,479.48 = 289,063.89/x
  3. Step 3: Cross multiply
    518,481.41x = 715,479.48 × 289,063.89
  4. Step 4: Simplify right side
    518,481.41x = 206,819,281,703.98
  5. Step 5: Solve for x
    x = 206,819,281,703.98/518,481.41
  6. Step 6: Final answer
    x = 398,894.31

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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.