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Finding the Fourth Proportional to 518,980.40, 715,556.70 and 426,777.56

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Solution

The fourth proportional to 518,980.40, 715,556.70 and 426,777.56 is: 588,429.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,980.40 : 715,556.70 = 426,777.56 : x
  2. Step 2: Convert to fraction form
    518,980.40/715,556.70 = 426,777.56/x
  3. Step 3: Cross multiply
    518,980.40x = 715,556.70 × 426,777.56
  4. Step 4: Simplify right side
    518,980.40x = 305,383,542,467.65
  5. Step 5: Solve for x
    x = 305,383,542,467.65/518,980.40
  6. Step 6: Final answer
    x = 588,429.82

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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.