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Finding the Fourth Proportional to 2,143.50, 3,215.79 and 604.50

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Solution

The fourth proportional to 2,143.50, 3,215.79 and 604.50 is: 906.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.50 : 3,215.79 = 604.50 : x
  2. Step 2: Convert to fraction form
    2,143.50/3,215.79 = 604.50/x
  3. Step 3: Cross multiply
    2,143.50x = 3,215.79 × 604.50
  4. Step 4: Simplify right side
    2,143.50x = 1,943,945.06
  5. Step 5: Solve for x
    x = 1,943,945.06/2,143.50
  6. Step 6: Final answer
    x = 906.90

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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.