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Finding the Fourth Proportional to 1,044.88, 1,440.44 and 729.68

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Solution

The fourth proportional to 1,044.88, 1,440.44 and 729.68 is: 1,005.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,044.88 : 1,440.44 = 729.68 : x
  2. Step 2: Convert to fraction form
    1,044.88/1,440.44 = 729.68/x
  3. Step 3: Cross multiply
    1,044.88x = 1,440.44 × 729.68
  4. Step 4: Simplify right side
    1,044.88x = 1,051,060.26
  5. Step 5: Solve for x
    x = 1,051,060.26/1,044.88
  6. Step 6: Final answer
    x = 1,005.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.