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Finding the Fourth Proportional to 591.10, 815.74 and 325.56

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Solution

The fourth proportional to 591.10, 815.74 and 325.56 is: 449.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.10 : 815.74 = 325.56 : x
  2. Step 2: Convert to fraction form
    591.10/815.74 = 325.56/x
  3. Step 3: Cross multiply
    591.10x = 815.74 × 325.56
  4. Step 4: Simplify right side
    591.10x = 265,572.31
  5. Step 5: Solve for x
    x = 265,572.31/591.10
  6. Step 6: Final answer
    x = 449.28

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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.