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Finding the Fourth Proportional to 1,040.02, 1,434.87 and 667.23

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Solution

The fourth proportional to 1,040.02, 1,434.87 and 667.23 is: 920.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.02 : 1,434.87 = 667.23 : x
  2. Step 2: Convert to fraction form
    1,040.02/1,434.87 = 667.23/x
  3. Step 3: Cross multiply
    1,040.02x = 1,434.87 × 667.23
  4. Step 4: Simplify right side
    1,040.02x = 957,388.31
  5. Step 5: Solve for x
    x = 957,388.31/1,040.02
  6. Step 6: Final answer
    x = 920.55

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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.