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Finding the Fourth Proportional to 766.96, 1,151.30 and 479.05

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Solution

The fourth proportional to 766.96, 1,151.30 and 479.05 is: 719.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.96 : 1,151.30 = 479.05 : x
  2. Step 2: Convert to fraction form
    766.96/1,151.30 = 479.05/x
  3. Step 3: Cross multiply
    766.96x = 1,151.30 × 479.05
  4. Step 4: Simplify right side
    766.96x = 551,530.27
  5. Step 5: Solve for x
    x = 551,530.27/766.96
  6. Step 6: Final answer
    x = 719.11

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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.