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Finding the Fourth Proportional to 518,701.68, 778,053.96 and 198,951.56

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Solution

The fourth proportional to 518,701.68, 778,053.96 and 198,951.56 is: 298,427.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,701.68 : 778,053.96 = 198,951.56 : x
  2. Step 2: Convert to fraction form
    518,701.68/778,053.96 = 198,951.56/x
  3. Step 3: Cross multiply
    518,701.68x = 778,053.96 × 198,951.56
  4. Step 4: Simplify right side
    518,701.68x = 154,795,049,106.18
  5. Step 5: Solve for x
    x = 154,795,049,106.18/518,701.68
  6. Step 6: Final answer
    x = 298,427.89

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1.5x scale

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.