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Finding the Fourth Proportional to 1,193.25, 1,787.76 and 498.39

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Solution

The fourth proportional to 1,193.25, 1,787.76 and 498.39 is: 746.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.25 : 1,787.76 = 498.39 : x
  2. Step 2: Convert to fraction form
    1,193.25/1,787.76 = 498.39/x
  3. Step 3: Cross multiply
    1,193.25x = 1,787.76 × 498.39
  4. Step 4: Simplify right side
    1,193.25x = 891,007.42
  5. Step 5: Solve for x
    x = 891,007.42/1,193.25
  6. Step 6: Final answer
    x = 746.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.