Home / 3,120-4,681.60-1,581.04

Finding the Fourth Proportional to 3,120, 4,681.60 and 1,581.04

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Solution

The fourth proportional to 3,120, 4,681.60 and 1,581.04 is: 2,372.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120 : 4,681.60 = 1,581.04 : x
  2. Step 2: Convert to fraction form
    3,120/4,681.60 = 1,581.04/x
  3. Step 3: Cross multiply
    3,120x = 4,681.60 × 1,581.04
  4. Step 4: Simplify right side
    3,120x = 7,401,796.86
  5. Step 5: Solve for x
    x = 7,401,796.86/3,120
  6. Step 6: Final answer
    x = 2,372.37

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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.