Home / 1,638.18-2,259.81-1,139.96

Finding the Fourth Proportional to 1,638.18, 2,259.81 and 1,139.96

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Solution

The fourth proportional to 1,638.18, 2,259.81 and 1,139.96 is: 1,572.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.18 : 2,259.81 = 1,139.96 : x
  2. Step 2: Convert to fraction form
    1,638.18/2,259.81 = 1,139.96/x
  3. Step 3: Cross multiply
    1,638.18x = 2,259.81 × 1,139.96
  4. Step 4: Simplify right side
    1,638.18x = 2,576,093.01
  5. Step 5: Solve for x
    x = 2,576,093.01/1,638.18
  6. Step 6: Final answer
    x = 1,572.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.