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Finding the Fourth Proportional to 913.22, 1,259.58 and 633.46

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Solution

The fourth proportional to 913.22, 1,259.58 and 633.46 is: 873.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.22 : 1,259.58 = 633.46 : x
  2. Step 2: Convert to fraction form
    913.22/1,259.58 = 633.46/x
  3. Step 3: Cross multiply
    913.22x = 1,259.58 × 633.46
  4. Step 4: Simplify right side
    913.22x = 797,893.55
  5. Step 5: Solve for x
    x = 797,893.55/913.22
  6. Step 6: Final answer
    x = 873.71

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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.