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Finding the Fourth Proportional to 518,991.92, 778,118.77 and 198,872.53

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Solution

The fourth proportional to 518,991.92, 778,118.77 and 198,872.53 is: 298,167.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,991.92 : 778,118.77 = 198,872.53 : x
  2. Step 2: Convert to fraction form
    518,991.92/778,118.77 = 198,872.53/x
  3. Step 3: Cross multiply
    518,991.92x = 778,118.77 × 198,872.53
  4. Step 4: Simplify right side
    518,991.92x = 154,746,445,615.02
  5. Step 5: Solve for x
    x = 154,746,445,615.02/518,991.92
  6. Step 6: Final answer
    x = 298,167.35

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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.