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Finding the Fourth Proportional to 2,126.70, 3,190.03 and 956.06

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Solution

The fourth proportional to 2,126.70, 3,190.03 and 956.06 is: 1,434.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.70 : 3,190.03 = 956.06 : x
  2. Step 2: Convert to fraction form
    2,126.70/3,190.03 = 956.06/x
  3. Step 3: Cross multiply
    2,126.70x = 3,190.03 × 956.06
  4. Step 4: Simplify right side
    2,126.70x = 3,049,841.74
  5. Step 5: Solve for x
    x = 3,049,841.74/2,126.70
  6. Step 6: Final answer
    x = 1,434.07

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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.