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Finding the Fourth Proportional to 3,916.50, 5,392.78 and 3,603.03

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Solution

The fourth proportional to 3,916.50, 5,392.78 and 3,603.03 is: 4,961.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916.50 : 5,392.78 = 3,603.03 : x
  2. Step 2: Convert to fraction form
    3,916.50/5,392.78 = 3,603.03/x
  3. Step 3: Cross multiply
    3,916.50x = 5,392.78 × 3,603.03
  4. Step 4: Simplify right side
    3,916.50x = 19,430,348.12
  5. Step 5: Solve for x
    x = 19,430,348.12/3,916.50
  6. Step 6: Final answer
    x = 4,961.15

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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.