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Finding the Fourth Proportional to 2,648.75, 3,971.94 and 1,415.87

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Solution

The fourth proportional to 2,648.75, 3,971.94 and 1,415.87 is: 2,123.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,648.75 : 3,971.94 = 1,415.87 : x
  2. Step 2: Convert to fraction form
    2,648.75/3,971.94 = 1,415.87/x
  3. Step 3: Cross multiply
    2,648.75x = 3,971.94 × 1,415.87
  4. Step 4: Simplify right side
    2,648.75x = 5,623,750.69
  5. Step 5: Solve for x
    x = 5,623,750.69/2,648.75
  6. Step 6: Final answer
    x = 2,123.17

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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.