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Finding the Fourth Proportional to 955.68, 1,317.64 and 731.90

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Solution

The fourth proportional to 955.68, 1,317.64 and 731.90 is: 1,009.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.68 : 1,317.64 = 731.90 : x
  2. Step 2: Convert to fraction form
    955.68/1,317.64 = 731.90/x
  3. Step 3: Cross multiply
    955.68x = 1,317.64 × 731.90
  4. Step 4: Simplify right side
    955.68x = 964,380.72
  5. Step 5: Solve for x
    x = 964,380.72/955.68
  6. Step 6: Final answer
    x = 1,009.10

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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.