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Finding the Fourth Proportional to 843.24, 1,263.42 and 458.76

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Solution

The fourth proportional to 843.24, 1,263.42 and 458.76 is: 687.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.24 : 1,263.42 = 458.76 : x
  2. Step 2: Convert to fraction form
    843.24/1,263.42 = 458.76/x
  3. Step 3: Cross multiply
    843.24x = 1,263.42 × 458.76
  4. Step 4: Simplify right side
    843.24x = 579,606.56
  5. Step 5: Solve for x
    x = 579,606.56/843.24
  6. Step 6: Final answer
    x = 687.36

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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.