Home / 5,280.45-7,287.00-2,857.81

Finding the Fourth Proportional to 5,280.45, 7,287.00 and 2,857.81

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Solution

The fourth proportional to 5,280.45, 7,287.00 and 2,857.81 is: 3,943.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.45 : 7,287.00 = 2,857.81 : x
  2. Step 2: Convert to fraction form
    5,280.45/7,287.00 = 2,857.81/x
  3. Step 3: Cross multiply
    5,280.45x = 7,287.00 × 2,857.81
  4. Step 4: Simplify right side
    5,280.45x = 20,824,881.30
  5. Step 5: Solve for x
    x = 20,824,881.30/5,280.45
  6. Step 6: Final answer
    x = 3,943.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.