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Finding the Fourth Proportional to 518,519.20, 776,223.60 and 308,048.80

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Solution

The fourth proportional to 518,519.20, 776,223.60 and 308,048.80 is: 461,149.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,519.20 : 776,223.60 = 308,048.80 : x
  2. Step 2: Convert to fraction form
    518,519.20/776,223.60 = 308,048.80/x
  3. Step 3: Cross multiply
    518,519.20x = 776,223.60 × 308,048.80
  4. Step 4: Simplify right side
    518,519.20x = 239,114,748,511.68
  5. Step 5: Solve for x
    x = 239,114,748,511.68/518,519.20
  6. Step 6: Final answer
    x = 461,149.27

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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.