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Finding the Fourth Proportional to 5,079.66, 7,621.65 and 2,855.81

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Solution

The fourth proportional to 5,079.66, 7,621.65 and 2,855.81 is: 4,284.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,079.66 : 7,621.65 = 2,855.81 : x
  2. Step 2: Convert to fraction form
    5,079.66/7,621.65 = 2,855.81/x
  3. Step 3: Cross multiply
    5,079.66x = 7,621.65 × 2,855.81
  4. Step 4: Simplify right side
    5,079.66x = 21,765,946.18
  5. Step 5: Solve for x
    x = 21,765,946.18/5,079.66
  6. Step 6: Final answer
    x = 4,284.92

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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.