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Finding the Fourth Proportional to 2,285.06, 3,426.50 and 986

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Solution

The fourth proportional to 2,285.06, 3,426.50 and 986 is: 1,478.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.06 : 3,426.50 = 986 : x
  2. Step 2: Convert to fraction form
    2,285.06/3,426.50 = 986/x
  3. Step 3: Cross multiply
    2,285.06x = 3,426.50 × 986
  4. Step 4: Simplify right side
    2,285.06x = 3,378,529
  5. Step 5: Solve for x
    x = 3,378,529/2,285.06
  6. Step 6: Final answer
    x = 1,478.53

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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.