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Finding the Fourth Proportional to 591.68, 816.52 and 355.66

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Solution

The fourth proportional to 591.68, 816.52 and 355.66 is: 490.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.68 : 816.52 = 355.66 : x
  2. Step 2: Convert to fraction form
    591.68/816.52 = 355.66/x
  3. Step 3: Cross multiply
    591.68x = 816.52 × 355.66
  4. Step 4: Simplify right side
    591.68x = 290,403.50
  5. Step 5: Solve for x
    x = 290,403.50/591.68
  6. Step 6: Final answer
    x = 490.81

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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.