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Finding the Fourth Proportional to 2,660.88, 4,006.80 and 1,972.44

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Solution

The fourth proportional to 2,660.88, 4,006.80 and 1,972.44 is: 2,970.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.88 : 4,006.80 = 1,972.44 : x
  2. Step 2: Convert to fraction form
    2,660.88/4,006.80 = 1,972.44/x
  3. Step 3: Cross multiply
    2,660.88x = 4,006.80 × 1,972.44
  4. Step 4: Simplify right side
    2,660.88x = 7,903,172.59
  5. Step 5: Solve for x
    x = 7,903,172.59/2,660.88
  6. Step 6: Final answer
    x = 2,970.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.