Home / 3,139.18-4,709.03-1,578.38

Finding the Fourth Proportional to 3,139.18, 4,709.03 and 1,578.38

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Solution

The fourth proportional to 3,139.18, 4,709.03 and 1,578.38 is: 2,367.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.18 : 4,709.03 = 1,578.38 : x
  2. Step 2: Convert to fraction form
    3,139.18/4,709.03 = 1,578.38/x
  3. Step 3: Cross multiply
    3,139.18x = 4,709.03 × 1,578.38
  4. Step 4: Simplify right side
    3,139.18x = 7,432,638.77
  5. Step 5: Solve for x
    x = 7,432,638.77/3,139.18
  6. Step 6: Final answer
    x = 2,367.70

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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.