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Finding the Fourth Proportional to 962.48, 1,326.84 and 686

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Solution

The fourth proportional to 962.48, 1,326.84 and 686 is: 945.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.48 : 1,326.84 = 686 : x
  2. Step 2: Convert to fraction form
    962.48/1,326.84 = 686/x
  3. Step 3: Cross multiply
    962.48x = 1,326.84 × 686
  4. Step 4: Simplify right side
    962.48x = 910,212.24
  5. Step 5: Solve for x
    x = 910,212.24/962.48
  6. Step 6: Final answer
    x = 945.69

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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.