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Finding the Fourth Proportional to 518,647.20, 776,415.60 and 308,176.80

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Solution

The fourth proportional to 518,647.20, 776,415.60 and 308,176.80 is: 461,341.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,647.20 : 776,415.60 = 308,176.80 : x
  2. Step 2: Convert to fraction form
    518,647.20/776,415.60 = 308,176.80/x
  3. Step 3: Cross multiply
    518,647.20x = 776,415.60 × 308,176.80
  4. Step 4: Simplify right side
    518,647.20x = 239,273,275,078.08
  5. Step 5: Solve for x
    x = 239,273,275,078.08/518,647.20
  6. Step 6: Final answer
    x = 461,341.11

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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.