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Finding the Fourth Proportional to 591.60, 816.28 and 443.90

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Solution

The fourth proportional to 591.60, 816.28 and 443.90 is: 612.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.60 : 816.28 = 443.90 : x
  2. Step 2: Convert to fraction form
    591.60/816.28 = 443.90/x
  3. Step 3: Cross multiply
    591.60x = 816.28 × 443.90
  4. Step 4: Simplify right side
    591.60x = 362,346.69
  5. Step 5: Solve for x
    x = 362,346.69/591.60
  6. Step 6: Final answer
    x = 612.49

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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.