Home / 5,161.40-7,742.10-1,265.78

Finding the Fourth Proportional to 5,161.40, 7,742.10 and 1,265.78

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Solution

The fourth proportional to 5,161.40, 7,742.10 and 1,265.78 is: 1,898.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,161.40 : 7,742.10 = 1,265.78 : x
  2. Step 2: Convert to fraction form
    5,161.40/7,742.10 = 1,265.78/x
  3. Step 3: Cross multiply
    5,161.40x = 7,742.10 × 1,265.78
  4. Step 4: Simplify right side
    5,161.40x = 9,799,795.34
  5. Step 5: Solve for x
    x = 9,799,795.34/5,161.40
  6. Step 6: Final answer
    x = 1,898.67

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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.