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Finding the Fourth Proportional to 1,966.70, 2,949.37 and 871.83

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Solution

The fourth proportional to 1,966.70, 2,949.37 and 871.83 is: 1,307.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,966.70 : 2,949.37 = 871.83 : x
  2. Step 2: Convert to fraction form
    1,966.70/2,949.37 = 871.83/x
  3. Step 3: Cross multiply
    1,966.70x = 2,949.37 × 871.83
  4. Step 4: Simplify right side
    1,966.70x = 2,571,349.25
  5. Step 5: Solve for x
    x = 2,571,349.25/1,966.70
  6. Step 6: Final answer
    x = 1,307.44

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1.5x scale

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.