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Finding the Fourth Proportional to 2,917.72, 4,376.17 and 837.90

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Solution

The fourth proportional to 2,917.72, 4,376.17 and 837.90 is: 1,256.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,917.72 : 4,376.17 = 837.90 : x
  2. Step 2: Convert to fraction form
    2,917.72/4,376.17 = 837.90/x
  3. Step 3: Cross multiply
    2,917.72x = 4,376.17 × 837.90
  4. Step 4: Simplify right side
    2,917.72x = 3,666,792.84
  5. Step 5: Solve for x
    x = 3,666,792.84/2,917.72
  6. Step 6: Final answer
    x = 1,256.73

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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.