Home / 3,720.20-5,580.80-1,123.32

Finding the Fourth Proportional to 3,720.20, 5,580.80 and 1,123.32

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Solution

The fourth proportional to 3,720.20, 5,580.80 and 1,123.32 is: 1,685.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.20 : 5,580.80 = 1,123.32 : x
  2. Step 2: Convert to fraction form
    3,720.20/5,580.80 = 1,123.32/x
  3. Step 3: Cross multiply
    3,720.20x = 5,580.80 × 1,123.32
  4. Step 4: Simplify right side
    3,720.20x = 6,269,024.26
  5. Step 5: Solve for x
    x = 6,269,024.26/3,720.20
  6. Step 6: Final answer
    x = 1,685.13

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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.