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Finding the Fourth Proportional to 4,985.87, 7,479.12 and 2,517.80

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Solution

The fourth proportional to 4,985.87, 7,479.12 and 2,517.80 is: 3,776.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.87 : 7,479.12 = 2,517.80 : x
  2. Step 2: Convert to fraction form
    4,985.87/7,479.12 = 2,517.80/x
  3. Step 3: Cross multiply
    4,985.87x = 7,479.12 × 2,517.80
  4. Step 4: Simplify right side
    4,985.87x = 18,830,928.34
  5. Step 5: Solve for x
    x = 18,830,928.34/4,985.87
  6. Step 6: Final answer
    x = 3,776.86

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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.