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Finding the Fourth Proportional to 518,992.20, 778,119.19 and 198,872.81

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Solution

The fourth proportional to 518,992.20, 778,119.19 and 198,872.81 is: 298,167.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,992.20 : 778,119.19 = 198,872.81 : x
  2. Step 2: Convert to fraction form
    518,992.20/778,119.19 = 198,872.81/x
  3. Step 3: Cross multiply
    518,992.20x = 778,119.19 × 198,872.81
  4. Step 4: Simplify right side
    518,992.20x = 154,746,748,360.39
  5. Step 5: Solve for x
    x = 154,746,748,360.39/518,992.20
  6. Step 6: Final answer
    x = 298,167.77

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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.