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Finding the Fourth Proportional to 3,690.81, 5,536.07 and 917.43

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Solution

The fourth proportional to 3,690.81, 5,536.07 and 917.43 is: 1,376.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,690.81 : 5,536.07 = 917.43 : x
  2. Step 2: Convert to fraction form
    3,690.81/5,536.07 = 917.43/x
  3. Step 3: Cross multiply
    3,690.81x = 5,536.07 × 917.43
  4. Step 4: Simplify right side
    3,690.81x = 5,078,952.11
  5. Step 5: Solve for x
    x = 5,078,952.11/3,690.81
  6. Step 6: Final answer
    x = 1,376.11

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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.