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Finding the Fourth Proportional to 2,915.82, 4,370.49 and 1,917.12

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Solution

The fourth proportional to 2,915.82, 4,370.49 and 1,917.12 is: 2,873.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.82 : 4,370.49 = 1,917.12 : x
  2. Step 2: Convert to fraction form
    2,915.82/4,370.49 = 1,917.12/x
  3. Step 3: Cross multiply
    2,915.82x = 4,370.49 × 1,917.12
  4. Step 4: Simplify right side
    2,915.82x = 8,378,753.79
  5. Step 5: Solve for x
    x = 8,378,753.79/2,915.82
  6. Step 6: Final answer
    x = 2,873.55

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1.5x scale

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.