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Finding the Fourth Proportional to 518,979.10, 778,468.65 and 279,830.65

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Solution

The fourth proportional to 518,979.10, 778,468.65 and 279,830.65 is: 419,745.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,979.10 : 778,468.65 = 279,830.65 : x
  2. Step 2: Convert to fraction form
    518,979.10/778,468.65 = 279,830.65/x
  3. Step 3: Cross multiply
    518,979.10x = 778,468.65 × 279,830.65
  4. Step 4: Simplify right side
    518,979.10x = 217,839,388,334.12
  5. Step 5: Solve for x
    x = 217,839,388,334.12/518,979.10
  6. Step 6: Final answer
    x = 419,745.98

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.