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Finding the Fourth Proportional to 769.30, 1,154.04 and 336.40

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Solution

The fourth proportional to 769.30, 1,154.04 and 336.40 is: 504.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.30 : 1,154.04 = 336.40 : x
  2. Step 2: Convert to fraction form
    769.30/1,154.04 = 336.40/x
  3. Step 3: Cross multiply
    769.30x = 1,154.04 × 336.40
  4. Step 4: Simplify right side
    769.30x = 388,211.60
  5. Step 5: Solve for x
    x = 388,211.60/769.30
  6. Step 6: Final answer
    x = 504.63

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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.