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Finding the Fourth Proportional to 793.11, 1,094.78 and 478.39

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Solution

The fourth proportional to 793.11, 1,094.78 and 478.39 is: 660.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.11 : 1,094.78 = 478.39 : x
  2. Step 2: Convert to fraction form
    793.11/1,094.78 = 478.39/x
  3. Step 3: Cross multiply
    793.11x = 1,094.78 × 478.39
  4. Step 4: Simplify right side
    793.11x = 523,731.80
  5. Step 5: Solve for x
    x = 523,731.80/793.11
  6. Step 6: Final answer
    x = 660.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.