Home / 3,720.90-5,581.50-1,381.50

Finding the Fourth Proportional to 3,720.90, 5,581.50 and 1,381.50

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Solution

The fourth proportional to 3,720.90, 5,581.50 and 1,381.50 is: 2,072.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.90 : 5,581.50 = 1,381.50 : x
  2. Step 2: Convert to fraction form
    3,720.90/5,581.50 = 1,381.50/x
  3. Step 3: Cross multiply
    3,720.90x = 5,581.50 × 1,381.50
  4. Step 4: Simplify right side
    3,720.90x = 7,710,842.25
  5. Step 5: Solve for x
    x = 7,710,842.25/3,720.90
  6. Step 6: Final answer
    x = 2,072.31

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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.