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Finding the Fourth Proportional to 519,977.10, 780,111.45 and 220,601.10

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Solution

The fourth proportional to 519,977.10, 780,111.45 and 220,601.10 is: 330,963.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,977.10 : 780,111.45 = 220,601.10 : x
  2. Step 2: Convert to fraction form
    519,977.10/780,111.45 = 220,601.10/x
  3. Step 3: Cross multiply
    519,977.10x = 780,111.45 × 220,601.10
  4. Step 4: Simplify right side
    519,977.10x = 172,093,443,992.60
  5. Step 5: Solve for x
    x = 172,093,443,992.60/519,977.10
  6. Step 6: Final answer
    x = 330,963.51

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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.