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Finding the Fourth Proportional to 3,957.61, 5,923.55 and 2,917.20

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Solution

The fourth proportional to 3,957.61, 5,923.55 and 2,917.20 is: 4,366.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,957.61 : 5,923.55 = 2,917.20 : x
  2. Step 2: Convert to fraction form
    3,957.61/5,923.55 = 2,917.20/x
  3. Step 3: Cross multiply
    3,957.61x = 5,923.55 × 2,917.20
  4. Step 4: Simplify right side
    3,957.61x = 17,280,180.06
  5. Step 5: Solve for x
    x = 17,280,180.06/3,957.61
  6. Step 6: Final answer
    x = 4,366.32

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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.