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Finding the Fourth Proportional to 795.78, 1,188.81 and 633.64

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Solution

The fourth proportional to 795.78, 1,188.81 and 633.64 is: 946.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    795.78 : 1,188.81 = 633.64 : x
  2. Step 2: Convert to fraction form
    795.78/1,188.81 = 633.64/x
  3. Step 3: Cross multiply
    795.78x = 1,188.81 × 633.64
  4. Step 4: Simplify right side
    795.78x = 753,274.40
  5. Step 5: Solve for x
    x = 753,274.40/795.78
  6. Step 6: Final answer
    x = 946.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.