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Finding the Fourth Proportional to 2,086.29, 3,128.95 and 605.12

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Solution

The fourth proportional to 2,086.29, 3,128.95 and 605.12 is: 907.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.29 : 3,128.95 = 605.12 : x
  2. Step 2: Convert to fraction form
    2,086.29/3,128.95 = 605.12/x
  3. Step 3: Cross multiply
    2,086.29x = 3,128.95 × 605.12
  4. Step 4: Simplify right side
    2,086.29x = 1,893,389.53
  5. Step 5: Solve for x
    x = 1,893,389.53/2,086.29
  6. Step 6: Final answer
    x = 907.54

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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.