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Finding the Fourth Proportional to 2,143.76, 3,215.90 and 604.76

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Solution

The fourth proportional to 2,143.76, 3,215.90 and 604.76 is: 907.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.76 : 3,215.90 = 604.76 : x
  2. Step 2: Convert to fraction form
    2,143.76/3,215.90 = 604.76/x
  3. Step 3: Cross multiply
    2,143.76x = 3,215.90 × 604.76
  4. Step 4: Simplify right side
    2,143.76x = 1,944,847.68
  5. Step 5: Solve for x
    x = 1,944,847.68/2,143.76
  6. Step 6: Final answer
    x = 907.21

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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.