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Finding the Fourth Proportional to 4,986.23, 7,479.35 and 4,681.76

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Solution

The fourth proportional to 4,986.23, 7,479.35 and 4,681.76 is: 7,022.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,986.23 : 7,479.35 = 4,681.76 : x
  2. Step 2: Convert to fraction form
    4,986.23/7,479.35 = 4,681.76/x
  3. Step 3: Cross multiply
    4,986.23x = 7,479.35 × 4,681.76
  4. Step 4: Simplify right side
    4,986.23x = 35,016,478.41
  5. Step 5: Solve for x
    x = 35,016,478.41/4,986.23
  6. Step 6: Final answer
    x = 7,022.64

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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.