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Finding the Fourth Proportional to 1,959.75, 2,939.18 and 572.74

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Solution

The fourth proportional to 1,959.75, 2,939.18 and 572.74 is: 858.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959.75 : 2,939.18 = 572.74 : x
  2. Step 2: Convert to fraction form
    1,959.75/2,939.18 = 572.74/x
  3. Step 3: Cross multiply
    1,959.75x = 2,939.18 × 572.74
  4. Step 4: Simplify right side
    1,959.75x = 1,683,375.74
  5. Step 5: Solve for x
    x = 1,683,375.74/1,959.75
  6. Step 6: Final answer
    x = 858.97

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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.