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Finding the Fourth Proportional to 793.18, 1,187.74 and 468.78

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Solution

The fourth proportional to 793.18, 1,187.74 and 468.78 is: 701.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.18 : 1,187.74 = 468.78 : x
  2. Step 2: Convert to fraction form
    793.18/1,187.74 = 468.78/x
  3. Step 3: Cross multiply
    793.18x = 1,187.74 × 468.78
  4. Step 4: Simplify right side
    793.18x = 556,788.76
  5. Step 5: Solve for x
    x = 556,788.76/793.18
  6. Step 6: Final answer
    x = 701.97

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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.