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Finding the Fourth Proportional to 518,530.80, 777,666.60 and 198,613.20

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Solution

The fourth proportional to 518,530.80, 777,666.60 and 198,613.20 is: 297,870.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,530.80 : 777,666.60 = 198,613.20 : x
  2. Step 2: Convert to fraction form
    518,530.80/777,666.60 = 198,613.20/x
  3. Step 3: Cross multiply
    518,530.80x = 777,666.60 × 198,613.20
  4. Step 4: Simplify right side
    518,530.80x = 154,454,851,959.12
  5. Step 5: Solve for x
    x = 154,454,851,959.12/518,530.80
  6. Step 6: Final answer
    x = 297,870.16

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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.