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Finding the Fourth Proportional to 793.18, 1,188.87 and 402.54

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Solution

The fourth proportional to 793.18, 1,188.87 and 402.54 is: 603.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.18 : 1,188.87 = 402.54 : x
  2. Step 2: Convert to fraction form
    793.18/1,188.87 = 402.54/x
  3. Step 3: Cross multiply
    793.18x = 1,188.87 × 402.54
  4. Step 4: Simplify right side
    793.18x = 478,567.73
  5. Step 5: Solve for x
    x = 478,567.73/793.18
  6. Step 6: Final answer
    x = 603.35

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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.