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Finding the Fourth Proportional to 793.58, 1,095.20 and 478.94

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Solution

The fourth proportional to 793.58, 1,095.20 and 478.94 is: 660.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.58 : 1,095.20 = 478.94 : x
  2. Step 2: Convert to fraction form
    793.58/1,095.20 = 478.94/x
  3. Step 3: Cross multiply
    793.58x = 1,095.20 × 478.94
  4. Step 4: Simplify right side
    793.58x = 524,530.81
  5. Step 5: Solve for x
    x = 524,530.81/793.58
  6. Step 6: Final answer
    x = 660.97

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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.