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Finding the Fourth Proportional to 1,959.70, 2,704.72 and 1,173.90

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Solution

The fourth proportional to 1,959.70, 2,704.72 and 1,173.90 is: 1,620.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959.70 : 2,704.72 = 1,173.90 : x
  2. Step 2: Convert to fraction form
    1,959.70/2,704.72 = 1,173.90/x
  3. Step 3: Cross multiply
    1,959.70x = 2,704.72 × 1,173.90
  4. Step 4: Simplify right side
    1,959.70x = 3,175,070.81
  5. Step 5: Solve for x
    x = 3,175,070.81/1,959.70
  6. Step 6: Final answer
    x = 1,620.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.