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Finding the Fourth Proportional to 768.04, 1,151.70 and 274.30

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Solution

The fourth proportional to 768.04, 1,151.70 and 274.30 is: 411.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.04 : 1,151.70 = 274.30 : x
  2. Step 2: Convert to fraction form
    768.04/1,151.70 = 274.30/x
  3. Step 3: Cross multiply
    768.04x = 1,151.70 × 274.30
  4. Step 4: Simplify right side
    768.04x = 315,905.55
  5. Step 5: Solve for x
    x = 315,905.55/768.04
  6. Step 6: Final answer
    x = 411.32

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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.