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Finding the Fourth Proportional to 3,945.54, 5,915.12 and 1,478.98

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Solution

The fourth proportional to 3,945.54, 5,915.12 and 1,478.98 is: 2,217.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.54 : 5,915.12 = 1,478.98 : x
  2. Step 2: Convert to fraction form
    3,945.54/5,915.12 = 1,478.98/x
  3. Step 3: Cross multiply
    3,945.54x = 5,915.12 × 1,478.98
  4. Step 4: Simplify right side
    3,945.54x = 8,748,344.18
  5. Step 5: Solve for x
    x = 8,748,344.18/3,945.54
  6. Step 6: Final answer
    x = 2,217.27

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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.