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Finding the Fourth Proportional to 2,915.54, 4,021.17 and 1,867.70

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Solution

The fourth proportional to 2,915.54, 4,021.17 and 1,867.70 is: 2,575.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.54 : 4,021.17 = 1,867.70 : x
  2. Step 2: Convert to fraction form
    2,915.54/4,021.17 = 1,867.70/x
  3. Step 3: Cross multiply
    2,915.54x = 4,021.17 × 1,867.70
  4. Step 4: Simplify right side
    2,915.54x = 7,510,339.21
  5. Step 5: Solve for x
    x = 7,510,339.21/2,915.54
  6. Step 6: Final answer
    x = 2,575.97

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1.5x scale

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.