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Finding the Fourth Proportional to 3,889.90, 5,827.10 and 1,807.08

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Solution

The fourth proportional to 3,889.90, 5,827.10 and 1,807.08 is: 2,707.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.90 : 5,827.10 = 1,807.08 : x
  2. Step 2: Convert to fraction form
    3,889.90/5,827.10 = 1,807.08/x
  3. Step 3: Cross multiply
    3,889.90x = 5,827.10 × 1,807.08
  4. Step 4: Simplify right side
    3,889.90x = 10,530,035.87
  5. Step 5: Solve for x
    x = 10,530,035.87/3,889.90
  6. Step 6: Final answer
    x = 2,707.02

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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.