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Finding the Fourth Proportional to 913.26, 1,258.98 and 633.39

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Solution

The fourth proportional to 913.26, 1,258.98 and 633.39 is: 873.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.26 : 1,258.98 = 633.39 : x
  2. Step 2: Convert to fraction form
    913.26/1,258.98 = 633.39/x
  3. Step 3: Cross multiply
    913.26x = 1,258.98 × 633.39
  4. Step 4: Simplify right side
    913.26x = 797,425.34
  5. Step 5: Solve for x
    x = 797,425.34/913.26
  6. Step 6: Final answer
    x = 873.16

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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.