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Finding the Fourth Proportional to 591.44, 816.08 and 355.32

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Solution

The fourth proportional to 591.44, 816.08 and 355.32 is: 490.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.44 : 816.08 = 355.32 : x
  2. Step 2: Convert to fraction form
    591.44/816.08 = 355.32/x
  3. Step 3: Cross multiply
    591.44x = 816.08 × 355.32
  4. Step 4: Simplify right side
    591.44x = 289,967.77
  5. Step 5: Solve for x
    x = 289,967.77/591.44
  6. Step 6: Final answer
    x = 490.28

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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.