Home / 1,638.14-2,456.37-542.21

Finding the Fourth Proportional to 1,638.14, 2,456.37 and 542.21

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Solution

The fourth proportional to 1,638.14, 2,456.37 and 542.21 is: 813.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.14 : 2,456.37 = 542.21 : x
  2. Step 2: Convert to fraction form
    1,638.14/2,456.37 = 542.21/x
  3. Step 3: Cross multiply
    1,638.14x = 2,456.37 × 542.21
  4. Step 4: Simplify right side
    1,638.14x = 1,331,856.10
  5. Step 5: Solve for x
    x = 1,331,856.10/1,638.14
  6. Step 6: Final answer
    x = 813.03

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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.