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Finding the Fourth Proportional to 965.39, 1,332.45 and 685.33

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Solution

The fourth proportional to 965.39, 1,332.45 and 685.33 is: 945.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.39 : 1,332.45 = 685.33 : x
  2. Step 2: Convert to fraction form
    965.39/1,332.45 = 685.33/x
  3. Step 3: Cross multiply
    965.39x = 1,332.45 × 685.33
  4. Step 4: Simplify right side
    965.39x = 913,164.63
  5. Step 5: Solve for x
    x = 913,164.63/965.39
  6. Step 6: Final answer
    x = 945.91

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Double scale
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1.5x scale

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.