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Finding the Fourth Proportional to 3,915.60, 5,894.70 and 3,379.92

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Solution

The fourth proportional to 3,915.60, 5,894.70 and 3,379.92 is: 5,088.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.60 : 5,894.70 = 3,379.92 : x
  2. Step 2: Convert to fraction form
    3,915.60/5,894.70 = 3,379.92/x
  3. Step 3: Cross multiply
    3,915.60x = 5,894.70 × 3,379.92
  4. Step 4: Simplify right side
    3,915.60x = 19,923,614.42
  5. Step 5: Solve for x
    x = 19,923,614.42/3,915.60
  6. Step 6: Final answer
    x = 5,088.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.