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Finding the Fourth Proportional to 1,094.85, 1,640.45 and 769.53

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Solution

The fourth proportional to 1,094.85, 1,640.45 and 769.53 is: 1,153.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,094.85 : 1,640.45 = 769.53 : x
  2. Step 2: Convert to fraction form
    1,094.85/1,640.45 = 769.53/x
  3. Step 3: Cross multiply
    1,094.85x = 1,640.45 × 769.53
  4. Step 4: Simplify right side
    1,094.85x = 1,262,383.56
  5. Step 5: Solve for x
    x = 1,262,383.56/1,094.85
  6. Step 6: Final answer
    x = 1,153.02

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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.