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Finding the Fourth Proportional to 1,044.84, 1,448.48 and 989.35

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Solution

The fourth proportional to 1,044.84, 1,448.48 and 989.35 is: 1,371.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,044.84 : 1,448.48 = 989.35 : x
  2. Step 2: Convert to fraction form
    1,044.84/1,448.48 = 989.35/x
  3. Step 3: Cross multiply
    1,044.84x = 1,448.48 × 989.35
  4. Step 4: Simplify right side
    1,044.84x = 1,433,053.69
  5. Step 5: Solve for x
    x = 1,433,053.69/1,044.84
  6. Step 6: Final answer
    x = 1,371.55

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.