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Finding the Fourth Proportional to 2,086.18, 3,129.28 and 625.34

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Solution

The fourth proportional to 2,086.18, 3,129.28 and 625.34 is: 938.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.18 : 3,129.28 = 625.34 : x
  2. Step 2: Convert to fraction form
    2,086.18/3,129.28 = 625.34/x
  3. Step 3: Cross multiply
    2,086.18x = 3,129.28 × 625.34
  4. Step 4: Simplify right side
    2,086.18x = 1,956,863.96
  5. Step 5: Solve for x
    x = 1,956,863.96/2,086.18
  6. Step 6: Final answer
    x = 938.01

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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.