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Finding the Fourth Proportional to 965.82, 1,443.22 and 655.09

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Solution

The fourth proportional to 965.82, 1,443.22 and 655.09 is: 978.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.82 : 1,443.22 = 655.09 : x
  2. Step 2: Convert to fraction form
    965.82/1,443.22 = 655.09/x
  3. Step 3: Cross multiply
    965.82x = 1,443.22 × 655.09
  4. Step 4: Simplify right side
    965.82x = 945,433.74
  5. Step 5: Solve for x
    x = 945,433.74/965.82
  6. Step 6: Final answer
    x = 978.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.