Home / 3,138.22-4,707.98-1,289.30

Finding the Fourth Proportional to 3,138.22, 4,707.98 and 1,289.30

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Solution

The fourth proportional to 3,138.22, 4,707.98 and 1,289.30 is: 1,934.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.22 : 4,707.98 = 1,289.30 : x
  2. Step 2: Convert to fraction form
    3,138.22/4,707.98 = 1,289.30/x
  3. Step 3: Cross multiply
    3,138.22x = 4,707.98 × 1,289.30
  4. Step 4: Simplify right side
    3,138.22x = 6,069,998.61
  5. Step 5: Solve for x
    x = 6,069,998.61/3,138.22
  6. Step 6: Final answer
    x = 1,934.22

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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.