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Finding the Fourth Proportional to 591.89, 816.50 and 395.69

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Solution

The fourth proportional to 591.89, 816.50 and 395.69 is: 545.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.89 : 816.50 = 395.69 : x
  2. Step 2: Convert to fraction form
    591.89/816.50 = 395.69/x
  3. Step 3: Cross multiply
    591.89x = 816.50 × 395.69
  4. Step 4: Simplify right side
    591.89x = 323,077.79
  5. Step 5: Solve for x
    x = 323,077.79/591.89
  6. Step 6: Final answer
    x = 545.85

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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.