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Finding the Fourth Proportional to 4,979.13, 7,468.17 and 3,124.74

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Solution

The fourth proportional to 4,979.13, 7,468.17 and 3,124.74 is: 4,686.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.13 : 7,468.17 = 3,124.74 : x
  2. Step 2: Convert to fraction form
    4,979.13/7,468.17 = 3,124.74/x
  3. Step 3: Cross multiply
    4,979.13x = 7,468.17 × 3,124.74
  4. Step 4: Simplify right side
    4,979.13x = 23,336,089.53
  5. Step 5: Solve for x
    x = 23,336,089.53/4,979.13
  6. Step 6: Final answer
    x = 4,686.78

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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.