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Finding the Fourth Proportional to 1,043.80, 1,440.99 and 671.08

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Solution

The fourth proportional to 1,043.80, 1,440.99 and 671.08 is: 926.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.80 : 1,440.99 = 671.08 : x
  2. Step 2: Convert to fraction form
    1,043.80/1,440.99 = 671.08/x
  3. Step 3: Cross multiply
    1,043.80x = 1,440.99 × 671.08
  4. Step 4: Simplify right side
    1,043.80x = 967,019.57
  5. Step 5: Solve for x
    x = 967,019.57/1,043.80
  6. Step 6: Final answer
    x = 926.44

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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.