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Finding the Fourth Proportional to 391.37, 583.73 and 330.07

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Solution

The fourth proportional to 391.37, 583.73 and 330.07 is: 492.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.37 : 583.73 = 330.07 : x
  2. Step 2: Convert to fraction form
    391.37/583.73 = 330.07/x
  3. Step 3: Cross multiply
    391.37x = 583.73 × 330.07
  4. Step 4: Simplify right side
    391.37x = 192,672.08
  5. Step 5: Solve for x
    x = 192,672.08/391.37
  6. Step 6: Final answer
    x = 492.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.