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Finding the Fourth Proportional to 1,057.93, 1,586.86 and 327.31

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Solution

The fourth proportional to 1,057.93, 1,586.86 and 327.31 is: 490.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.93 : 1,586.86 = 327.31 : x
  2. Step 2: Convert to fraction form
    1,057.93/1,586.86 = 327.31/x
  3. Step 3: Cross multiply
    1,057.93x = 1,586.86 × 327.31
  4. Step 4: Simplify right side
    1,057.93x = 519,390.36
  5. Step 5: Solve for x
    x = 519,390.36/1,057.93
  6. Step 6: Final answer
    x = 490.95

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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.