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Finding the Fourth Proportional to 1,399.92, 2,100.83 and 534.21

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Solution

The fourth proportional to 1,399.92, 2,100.83 and 534.21 is: 801.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.92 : 2,100.83 = 534.21 : x
  2. Step 2: Convert to fraction form
    1,399.92/2,100.83 = 534.21/x
  3. Step 3: Cross multiply
    1,399.92x = 2,100.83 × 534.21
  4. Step 4: Simplify right side
    1,399.92x = 1,122,284.39
  5. Step 5: Solve for x
    x = 1,122,284.39/1,399.92
  6. Step 6: Final answer
    x = 801.68

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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.