Home / 3,118.47-4,676.90-926.61

Finding the Fourth Proportional to 3,118.47, 4,676.90 and 926.61

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Solution

The fourth proportional to 3,118.47, 4,676.90 and 926.61 is: 1,389.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.47 : 4,676.90 = 926.61 : x
  2. Step 2: Convert to fraction form
    3,118.47/4,676.90 = 926.61/x
  3. Step 3: Cross multiply
    3,118.47x = 4,676.90 × 926.61
  4. Step 4: Simplify right side
    3,118.47x = 4,333,657.68
  5. Step 5: Solve for x
    x = 4,333,657.68/3,118.47
  6. Step 6: Final answer
    x = 1,389.67

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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.