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Finding the Fourth Proportional to 965.13, 1,331.87 and 551.13

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Solution

The fourth proportional to 965.13, 1,331.87 and 551.13 is: 760.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.13 : 1,331.87 = 551.13 : x
  2. Step 2: Convert to fraction form
    965.13/1,331.87 = 551.13/x
  3. Step 3: Cross multiply
    965.13x = 1,331.87 × 551.13
  4. Step 4: Simplify right side
    965.13x = 734,033.51
  5. Step 5: Solve for x
    x = 734,033.51/965.13
  6. Step 6: Final answer
    x = 760.55

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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.