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Finding the Fourth Proportional to 3,807.60, 5,703.30 and 3,078.60

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Solution

The fourth proportional to 3,807.60, 5,703.30 and 3,078.60 is: 4,611.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,807.60 : 5,703.30 = 3,078.60 : x
  2. Step 2: Convert to fraction form
    3,807.60/5,703.30 = 3,078.60/x
  3. Step 3: Cross multiply
    3,807.60x = 5,703.30 × 3,078.60
  4. Step 4: Simplify right side
    3,807.60x = 17,558,179.38
  5. Step 5: Solve for x
    x = 17,558,179.38/3,807.60
  6. Step 6: Final answer
    x = 4,611.35

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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.