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Finding the Fourth Proportional to 843.68, 1,263.56 and 534.64

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Solution

The fourth proportional to 843.68, 1,263.56 and 534.64 is: 800.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.68 : 1,263.56 = 534.64 : x
  2. Step 2: Convert to fraction form
    843.68/1,263.56 = 534.64/x
  3. Step 3: Cross multiply
    843.68x = 1,263.56 × 534.64
  4. Step 4: Simplify right side
    843.68x = 675,549.72
  5. Step 5: Solve for x
    x = 675,549.72/843.68
  6. Step 6: Final answer
    x = 800.72

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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.