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Finding the Fourth Proportional to 1,959.41, 2,939.59 and 572.76

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Solution

The fourth proportional to 1,959.41, 2,939.59 and 572.76 is: 859.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959.41 : 2,939.59 = 572.76 : x
  2. Step 2: Convert to fraction form
    1,959.41/2,939.59 = 572.76/x
  3. Step 3: Cross multiply
    1,959.41x = 2,939.59 × 572.76
  4. Step 4: Simplify right side
    1,959.41x = 1,683,679.57
  5. Step 5: Solve for x
    x = 1,683,679.57/1,959.41
  6. Step 6: Final answer
    x = 859.28

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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.