Home / 518,986.57-778,110.76-198,867.18

Finding the Fourth Proportional to 518,986.57, 778,110.76 and 198,867.18

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Solution

The fourth proportional to 518,986.57, 778,110.76 and 198,867.18 is: 298,159.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,986.57 : 778,110.76 = 198,867.18 : x
  2. Step 2: Convert to fraction form
    518,986.57/778,110.76 = 198,867.18/x
  3. Step 3: Cross multiply
    518,986.57x = 778,110.76 × 198,867.18
  4. Step 4: Simplify right side
    518,986.57x = 154,740,688,051.42
  5. Step 5: Solve for x
    x = 154,740,688,051.42/518,986.57
  6. Step 6: Final answer
    x = 298,159.33

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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.