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Finding the Fourth Proportional to 1,951.76, 2,920.43 and 1,172.23

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Solution

The fourth proportional to 1,951.76, 2,920.43 and 1,172.23 is: 1,754.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,951.76 : 2,920.43 = 1,172.23 : x
  2. Step 2: Convert to fraction form
    1,951.76/2,920.43 = 1,172.23/x
  3. Step 3: Cross multiply
    1,951.76x = 2,920.43 × 1,172.23
  4. Step 4: Simplify right side
    1,951.76x = 3,423,420.03
  5. Step 5: Solve for x
    x = 3,423,420.03/1,951.76
  6. Step 6: Final answer
    x = 1,754.02

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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.