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Finding the Fourth Proportional to 3,690.72, 5,531.40 and 1,498.20

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Solution

The fourth proportional to 3,690.72, 5,531.40 and 1,498.20 is: 2,245.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,690.72 : 5,531.40 = 1,498.20 : x
  2. Step 2: Convert to fraction form
    3,690.72/5,531.40 = 1,498.20/x
  3. Step 3: Cross multiply
    3,690.72x = 5,531.40 × 1,498.20
  4. Step 4: Simplify right side
    3,690.72x = 8,287,143.48
  5. Step 5: Solve for x
    x = 8,287,143.48/3,690.72
  6. Step 6: Final answer
    x = 2,245.40

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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.