Home / 3,720.96-5,580.48-1,123.20

Finding the Fourth Proportional to 3,720.96, 5,580.48 and 1,123.20

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Solution

The fourth proportional to 3,720.96, 5,580.48 and 1,123.20 is: 1,684.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.96 : 5,580.48 = 1,123.20 : x
  2. Step 2: Convert to fraction form
    3,720.96/5,580.48 = 1,123.20/x
  3. Step 3: Cross multiply
    3,720.96x = 5,580.48 × 1,123.20
  4. Step 4: Simplify right side
    3,720.96x = 6,267,995.14
  5. Step 5: Solve for x
    x = 6,267,995.14/3,720.96
  6. Step 6: Final answer
    x = 1,684.51

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1.5x scale

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.