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Finding the Fourth Proportional to 1,959.30, 2,939.34 and 572.64

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Solution

The fourth proportional to 1,959.30, 2,939.34 and 572.64 is: 859.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959.30 : 2,939.34 = 572.64 : x
  2. Step 2: Convert to fraction form
    1,959.30/2,939.34 = 572.64/x
  3. Step 3: Cross multiply
    1,959.30x = 2,939.34 × 572.64
  4. Step 4: Simplify right side
    1,959.30x = 1,683,183.66
  5. Step 5: Solve for x
    x = 1,683,183.66/1,959.30
  6. Step 6: Final answer
    x = 859.07

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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.