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Finding the Fourth Proportional to 3,807.78, 5,711.59 and 1,957.80

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Solution

The fourth proportional to 3,807.78, 5,711.59 and 1,957.80 is: 2,936.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,807.78 : 5,711.59 = 1,957.80 : x
  2. Step 2: Convert to fraction form
    3,807.78/5,711.59 = 1,957.80/x
  3. Step 3: Cross multiply
    3,807.78x = 5,711.59 × 1,957.80
  4. Step 4: Simplify right side
    3,807.78x = 11,182,150.90
  5. Step 5: Solve for x
    x = 11,182,150.90/3,807.78
  6. Step 6: Final answer
    x = 2,936.66

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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.