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Finding the Fourth Proportional to 3,915.80, 5,873.70 and 3,764.60

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Solution

The fourth proportional to 3,915.80, 5,873.70 and 3,764.60 is: 5,646.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.80 : 5,873.70 = 3,764.60 : x
  2. Step 2: Convert to fraction form
    3,915.80/5,873.70 = 3,764.60/x
  3. Step 3: Cross multiply
    3,915.80x = 5,873.70 × 3,764.60
  4. Step 4: Simplify right side
    3,915.80x = 22,112,131.02
  5. Step 5: Solve for x
    x = 22,112,131.02/3,915.80
  6. Step 6: Final answer
    x = 5,646.90

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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.