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Finding the Fourth Proportional to 3,679.61, 5,519.22 and 906.30

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Solution

The fourth proportional to 3,679.61, 5,519.22 and 906.30 is: 1,359.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,679.61 : 5,519.22 = 906.30 : x
  2. Step 2: Convert to fraction form
    3,679.61/5,519.22 = 906.30/x
  3. Step 3: Cross multiply
    3,679.61x = 5,519.22 × 906.30
  4. Step 4: Simplify right side
    3,679.61x = 5,002,069.09
  5. Step 5: Solve for x
    x = 5,002,069.09/3,679.61
  6. Step 6: Final answer
    x = 1,359.40

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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.