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Finding the Fourth Proportional to 1,972.68, 2,959.18 and 656.39

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Solution

The fourth proportional to 1,972.68, 2,959.18 and 656.39 is: 984.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.68 : 2,959.18 = 656.39 : x
  2. Step 2: Convert to fraction form
    1,972.68/2,959.18 = 656.39/x
  3. Step 3: Cross multiply
    1,972.68x = 2,959.18 × 656.39
  4. Step 4: Simplify right side
    1,972.68x = 1,942,359.72
  5. Step 5: Solve for x
    x = 1,942,359.72/1,972.68
  6. Step 6: Final answer
    x = 984.63

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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.