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Finding the Fourth Proportional to 1,984.71, 2,976.95 and 888.78

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Solution

The fourth proportional to 1,984.71, 2,976.95 and 888.78 is: 1,333.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984.71 : 2,976.95 = 888.78 : x
  2. Step 2: Convert to fraction form
    1,984.71/2,976.95 = 888.78/x
  3. Step 3: Cross multiply
    1,984.71x = 2,976.95 × 888.78
  4. Step 4: Simplify right side
    1,984.71x = 2,645,849.18
  5. Step 5: Solve for x
    x = 2,645,849.18/1,984.71
  6. Step 6: Final answer
    x = 1,333.12

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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.