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Finding the Fourth Proportional to 962.64, 1,326.60 and 686.16

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Solution

The fourth proportional to 962.64, 1,326.60 and 686.16 is: 945.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.64 : 1,326.60 = 686.16 : x
  2. Step 2: Convert to fraction form
    962.64/1,326.60 = 686.16/x
  3. Step 3: Cross multiply
    962.64x = 1,326.60 × 686.16
  4. Step 4: Simplify right side
    962.64x = 910,259.86
  5. Step 5: Solve for x
    x = 910,259.86/962.64
  6. Step 6: Final answer
    x = 945.59

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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.