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Finding the Fourth Proportional to 591.15, 815.77 and 342.49

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Solution

The fourth proportional to 591.15, 815.77 and 342.49 is: 472.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.15 : 815.77 = 342.49 : x
  2. Step 2: Convert to fraction form
    591.15/815.77 = 342.49/x
  3. Step 3: Cross multiply
    591.15x = 815.77 × 342.49
  4. Step 4: Simplify right side
    591.15x = 279,393.07
  5. Step 5: Solve for x
    x = 279,393.07/591.15
  6. Step 6: Final answer
    x = 472.63

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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.