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Finding the Fourth Proportional to 1,959.57, 2,939.36 and 661.95

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Solution

The fourth proportional to 1,959.57, 2,939.36 and 661.95 is: 992.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959.57 : 2,939.36 = 661.95 : x
  2. Step 2: Convert to fraction form
    1,959.57/2,939.36 = 661.95/x
  3. Step 3: Cross multiply
    1,959.57x = 2,939.36 × 661.95
  4. Step 4: Simplify right side
    1,959.57x = 1,945,709.35
  5. Step 5: Solve for x
    x = 1,945,709.35/1,959.57
  6. Step 6: Final answer
    x = 992.93

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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.