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Finding the Fourth Proportional to 793.86, 1,188.63 and 617.55

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Solution

The fourth proportional to 793.86, 1,188.63 and 617.55 is: 924.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.86 : 1,188.63 = 617.55 : x
  2. Step 2: Convert to fraction form
    793.86/1,188.63 = 617.55/x
  3. Step 3: Cross multiply
    793.86x = 1,188.63 × 617.55
  4. Step 4: Simplify right side
    793.86x = 734,038.46
  5. Step 5: Solve for x
    x = 734,038.46/793.86
  6. Step 6: Final answer
    x = 924.64

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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.