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Finding the Fourth Proportional to 3,618.81, 5,420.12 and 3,446.69

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Solution

The fourth proportional to 3,618.81, 5,420.12 and 3,446.69 is: 5,162.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.81 : 5,420.12 = 3,446.69 : x
  2. Step 2: Convert to fraction form
    3,618.81/5,420.12 = 3,446.69/x
  3. Step 3: Cross multiply
    3,618.81x = 5,420.12 × 3,446.69
  4. Step 4: Simplify right side
    3,618.81x = 18,681,429.07
  5. Step 5: Solve for x
    x = 18,681,429.07/3,618.81
  6. Step 6: Final answer
    x = 5,162.31

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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.