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Finding the Fourth Proportional to 591.09, 881.48 and 518.31

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Solution

The fourth proportional to 591.09, 881.48 and 518.31 is: 772.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.09 : 881.48 = 518.31 : x
  2. Step 2: Convert to fraction form
    591.09/881.48 = 518.31/x
  3. Step 3: Cross multiply
    591.09x = 881.48 × 518.31
  4. Step 4: Simplify right side
    591.09x = 456,877.31
  5. Step 5: Solve for x
    x = 456,877.31/591.09
  6. Step 6: Final answer
    x = 772.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.