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Finding the Fourth Proportional to 1,885.28, 2,828.76 and 731.12

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Solution

The fourth proportional to 1,885.28, 2,828.76 and 731.12 is: 1,097.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,885.28 : 2,828.76 = 731.12 : x
  2. Step 2: Convert to fraction form
    1,885.28/2,828.76 = 731.12/x
  3. Step 3: Cross multiply
    1,885.28x = 2,828.76 × 731.12
  4. Step 4: Simplify right side
    1,885.28x = 2,068,163.01
  5. Step 5: Solve for x
    x = 2,068,163.01/1,885.28
  6. Step 6: Final answer
    x = 1,097.01

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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.