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Finding the Fourth Proportional to 3,918, 5,394.85 and 3,604.53

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Solution

The fourth proportional to 3,918, 5,394.85 and 3,604.53 is: 4,963.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918 : 5,394.85 = 3,604.53 : x
  2. Step 2: Convert to fraction form
    3,918/5,394.85 = 3,604.53/x
  3. Step 3: Cross multiply
    3,918x = 5,394.85 × 3,604.53
  4. Step 4: Simplify right side
    3,918x = 19,445,898.67
  5. Step 5: Solve for x
    x = 19,445,898.67/3,918
  6. Step 6: Final answer
    x = 4,963.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.