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Finding the Fourth Proportional to 505,650.69, 757,612.62 and 278,136.65

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Solution

The fourth proportional to 505,650.69, 757,612.62 and 278,136.65 is: 416,730.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,650.69 : 757,612.62 = 278,136.65 : x
  2. Step 2: Convert to fraction form
    505,650.69/757,612.62 = 278,136.65/x
  3. Step 3: Cross multiply
    505,650.69x = 757,612.62 × 278,136.65
  4. Step 4: Simplify right side
    505,650.69x = 210,719,838,018.56
  5. Step 5: Solve for x
    x = 210,719,838,018.56/505,650.69
  6. Step 6: Final answer
    x = 416,730.05

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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.