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Finding the Fourth Proportional to 2,134.40, 3,203.40 and 1,039.70

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Solution

The fourth proportional to 2,134.40, 3,203.40 and 1,039.70 is: 1,560.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,134.40 : 3,203.40 = 1,039.70 : x
  2. Step 2: Convert to fraction form
    2,134.40/3,203.40 = 1,039.70/x
  3. Step 3: Cross multiply
    2,134.40x = 3,203.40 × 1,039.70
  4. Step 4: Simplify right side
    2,134.40x = 3,330,574.98
  5. Step 5: Solve for x
    x = 3,330,574.98/2,134.40
  6. Step 6: Final answer
    x = 1,560.43

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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.