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Finding the Fourth Proportional to 965.75, 1,332.75 and 551.75

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Solution

The fourth proportional to 965.75, 1,332.75 and 551.75 is: 761.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.75 : 1,332.75 = 551.75 : x
  2. Step 2: Convert to fraction form
    965.75/1,332.75 = 551.75/x
  3. Step 3: Cross multiply
    965.75x = 1,332.75 × 551.75
  4. Step 4: Simplify right side
    965.75x = 735,344.81
  5. Step 5: Solve for x
    x = 735,344.81/965.75
  6. Step 6: Final answer
    x = 761.42

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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.