Home / 2,908.72-4,015.68-1,915.66

Finding the Fourth Proportional to 2,908.72, 4,015.68 and 1,915.66

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Solution

The fourth proportional to 2,908.72, 4,015.68 and 1,915.66 is: 2,644.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,908.72 : 4,015.68 = 1,915.66 : x
  2. Step 2: Convert to fraction form
    2,908.72/4,015.68 = 1,915.66/x
  3. Step 3: Cross multiply
    2,908.72x = 4,015.68 × 1,915.66
  4. Step 4: Simplify right side
    2,908.72x = 7,692,677.55
  5. Step 5: Solve for x
    x = 7,692,677.55/2,908.72
  6. Step 6: Final answer
    x = 2,644.70

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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.