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Finding the Fourth Proportional to 3,951.72, 5,927.58 and 1,643.40

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Solution

The fourth proportional to 3,951.72, 5,927.58 and 1,643.40 is: 2,465.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.72 : 5,927.58 = 1,643.40 : x
  2. Step 2: Convert to fraction form
    3,951.72/5,927.58 = 1,643.40/x
  3. Step 3: Cross multiply
    3,951.72x = 5,927.58 × 1,643.40
  4. Step 4: Simplify right side
    3,951.72x = 9,741,384.97
  5. Step 5: Solve for x
    x = 9,741,384.97/3,951.72
  6. Step 6: Final answer
    x = 2,465.10

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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.