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Finding the Fourth Proportional to 3,720.98, 5,581.74 and 2,078.30

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Solution

The fourth proportional to 3,720.98, 5,581.74 and 2,078.30 is: 3,117.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.98 : 5,581.74 = 2,078.30 : x
  2. Step 2: Convert to fraction form
    3,720.98/5,581.74 = 2,078.30/x
  3. Step 3: Cross multiply
    3,720.98x = 5,581.74 × 2,078.30
  4. Step 4: Simplify right side
    3,720.98x = 11,600,530.24
  5. Step 5: Solve for x
    x = 11,600,530.24/3,720.98
  6. Step 6: Final answer
    x = 3,117.60

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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.