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Finding the Fourth Proportional to 591.19, 815.85 and 342.57

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Solution

The fourth proportional to 591.19, 815.85 and 342.57 is: 472.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.19 : 815.85 = 342.57 : x
  2. Step 2: Convert to fraction form
    591.19/815.85 = 342.57/x
  3. Step 3: Cross multiply
    591.19x = 815.85 × 342.57
  4. Step 4: Simplify right side
    591.19x = 279,488.63
  5. Step 5: Solve for x
    x = 279,488.63/591.19
  6. Step 6: Final answer
    x = 472.75

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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.