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Finding the Fourth Proportional to 682.11, 1,021.68 and 534.87

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Solution

The fourth proportional to 682.11, 1,021.68 and 534.87 is: 801.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.11 : 1,021.68 = 534.87 : x
  2. Step 2: Convert to fraction form
    682.11/1,021.68 = 534.87/x
  3. Step 3: Cross multiply
    682.11x = 1,021.68 × 534.87
  4. Step 4: Simplify right side
    682.11x = 546,465.98
  5. Step 5: Solve for x
    x = 546,465.98/682.11
  6. Step 6: Final answer
    x = 801.14

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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.