Home / 3,720.79-5,581.32-1,123.75

Finding the Fourth Proportional to 3,720.79, 5,581.32 and 1,123.75

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Solution

The fourth proportional to 3,720.79, 5,581.32 and 1,123.75 is: 1,685.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.79 : 5,581.32 = 1,123.75 : x
  2. Step 2: Convert to fraction form
    3,720.79/5,581.32 = 1,123.75/x
  3. Step 3: Cross multiply
    3,720.79x = 5,581.32 × 1,123.75
  4. Step 4: Simplify right side
    3,720.79x = 6,272,008.35
  5. Step 5: Solve for x
    x = 6,272,008.35/3,720.79
  6. Step 6: Final answer
    x = 1,685.67

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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.