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Finding the Fourth Proportional to 433.18, 596.33 and 391.61

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Solution

The fourth proportional to 433.18, 596.33 and 391.61 is: 539.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.18 : 596.33 = 391.61 : x
  2. Step 2: Convert to fraction form
    433.18/596.33 = 391.61/x
  3. Step 3: Cross multiply
    433.18x = 596.33 × 391.61
  4. Step 4: Simplify right side
    433.18x = 233,528.79
  5. Step 5: Solve for x
    x = 233,528.79/433.18
  6. Step 6: Final answer
    x = 539.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.