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Finding the Fourth Proportional to 3,690.40, 4,872.48 and 3,690.40

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Solution

The fourth proportional to 3,690.40, 4,872.48 and 3,690.40 is: 4,872.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,690.40 : 4,872.48 = 3,690.40 : x
  2. Step 2: Convert to fraction form
    3,690.40/4,872.48 = 3,690.40/x
  3. Step 3: Cross multiply
    3,690.40x = 4,872.48 × 3,690.40
  4. Step 4: Simplify right side
    3,690.40x = 17,981,400.19
  5. Step 5: Solve for x
    x = 17,981,400.19/3,690.40
  6. Step 6: Final answer
    x = 4,872.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.