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Finding the Fourth Proportional to 793.93, 1,188.45 and 621.10

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Solution

The fourth proportional to 793.93, 1,188.45 and 621.10 is: 929.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.93 : 1,188.45 = 621.10 : x
  2. Step 2: Convert to fraction form
    793.93/1,188.45 = 621.10/x
  3. Step 3: Cross multiply
    793.93x = 1,188.45 × 621.10
  4. Step 4: Simplify right side
    793.93x = 738,146.30
  5. Step 5: Solve for x
    x = 738,146.30/793.93
  6. Step 6: Final answer
    x = 929.74

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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.