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Finding the Fourth Proportional to 518,722.20, 778,083.30 and 308,251.80

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Solution

The fourth proportional to 518,722.20, 778,083.30 and 308,251.80 is: 462,377.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,722.20 : 778,083.30 = 308,251.80 : x
  2. Step 2: Convert to fraction form
    518,722.20/778,083.30 = 308,251.80/x
  3. Step 3: Cross multiply
    518,722.20x = 778,083.30 × 308,251.80
  4. Step 4: Simplify right side
    518,722.20x = 239,845,577,774.94
  5. Step 5: Solve for x
    x = 239,845,577,774.94/518,722.20
  6. Step 6: Final answer
    x = 462,377.70

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Similar ratio
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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.