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Finding the Fourth Proportional to 843.62, 1,263.26 and 770.18

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Solution

The fourth proportional to 843.62, 1,263.26 and 770.18 is: 1,153.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.62 : 1,263.26 = 770.18 : x
  2. Step 2: Convert to fraction form
    843.62/1,263.26 = 770.18/x
  3. Step 3: Cross multiply
    843.62x = 1,263.26 × 770.18
  4. Step 4: Simplify right side
    843.62x = 972,927.42
  5. Step 5: Solve for x
    x = 972,927.42/843.62
  6. Step 6: Final answer
    x = 1,153.28

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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.