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Finding the Fourth Proportional to 591.56, 817.38 and 486.56

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Solution

The fourth proportional to 591.56, 817.38 and 486.56 is: 672.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.56 : 817.38 = 486.56 : x
  2. Step 2: Convert to fraction form
    591.56/817.38 = 486.56/x
  3. Step 3: Cross multiply
    591.56x = 817.38 × 486.56
  4. Step 4: Simplify right side
    591.56x = 397,706.46
  5. Step 5: Solve for x
    x = 397,706.46/591.56
  6. Step 6: Final answer
    x = 672.30

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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.