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Finding the Fourth Proportional to 3,603.50, 4,971.62 and 2,939.20

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Solution

The fourth proportional to 3,603.50, 4,971.62 and 2,939.20 is: 4,055.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,603.50 : 4,971.62 = 2,939.20 : x
  2. Step 2: Convert to fraction form
    3,603.50/4,971.62 = 2,939.20/x
  3. Step 3: Cross multiply
    3,603.50x = 4,971.62 × 2,939.20
  4. Step 4: Simplify right side
    3,603.50x = 14,612,585.50
  5. Step 5: Solve for x
    x = 14,612,585.50/3,603.50
  6. Step 6: Final answer
    x = 4,055.11

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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.