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Finding the Fourth Proportional to 518,280.36, 777,087.72 and 218,679

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Solution

The fourth proportional to 518,280.36, 777,087.72 and 218,679 is: 327,878.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,280.36 : 777,087.72 = 218,679 : x
  2. Step 2: Convert to fraction form
    518,280.36/777,087.72 = 218,679/x
  3. Step 3: Cross multiply
    518,280.36x = 777,087.72 × 218,679
  4. Step 4: Simplify right side
    518,280.36x = 169,932,765,521.88
  5. Step 5: Solve for x
    x = 169,932,765,521.88/518,280.36
  6. Step 6: Final answer
    x = 327,878.07

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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.