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Finding the Fourth Proportional to 1,875.28, 2,812.92 and 720.22

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Solution

The fourth proportional to 1,875.28, 2,812.92 and 720.22 is: 1,080.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.28 : 2,812.92 = 720.22 : x
  2. Step 2: Convert to fraction form
    1,875.28/2,812.92 = 720.22/x
  3. Step 3: Cross multiply
    1,875.28x = 2,812.92 × 720.22
  4. Step 4: Simplify right side
    1,875.28x = 2,025,921.24
  5. Step 5: Solve for x
    x = 2,025,921.24/1,875.28
  6. Step 6: Final answer
    x = 1,080.33

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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.