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Finding the Fourth Proportional to 518,943.91, 778,520.90 and 219,424

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Solution

The fourth proportional to 518,943.91, 778,520.90 and 219,424 is: 329,180.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,943.91 : 778,520.90 = 219,424 : x
  2. Step 2: Convert to fraction form
    518,943.91/778,520.90 = 219,424/x
  3. Step 3: Cross multiply
    518,943.91x = 778,520.90 × 219,424
  4. Step 4: Simplify right side
    518,943.91x = 170,826,169,961.60
  5. Step 5: Solve for x
    x = 170,826,169,961.60/518,943.91
  6. Step 6: Final answer
    x = 329,180.41

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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.