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Finding the Fourth Proportional to 2,387.84, 3,581.28 and 1,928.28

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Solution

The fourth proportional to 2,387.84, 3,581.28 and 1,928.28 is: 2,892.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.84 : 3,581.28 = 1,928.28 : x
  2. Step 2: Convert to fraction form
    2,387.84/3,581.28 = 1,928.28/x
  3. Step 3: Cross multiply
    2,387.84x = 3,581.28 × 1,928.28
  4. Step 4: Simplify right side
    2,387.84x = 6,905,710.60
  5. Step 5: Solve for x
    x = 6,905,710.60/2,387.84
  6. Step 6: Final answer
    x = 2,892.03

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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.