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Finding the Fourth Proportional to 590.79, 815.31 and 328.82

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Solution

The fourth proportional to 590.79, 815.31 and 328.82 is: 453.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.79 : 815.31 = 328.82 : x
  2. Step 2: Convert to fraction form
    590.79/815.31 = 328.82/x
  3. Step 3: Cross multiply
    590.79x = 815.31 × 328.82
  4. Step 4: Simplify right side
    590.79x = 268,086.16
  5. Step 5: Solve for x
    x = 268,086.16/590.79
  6. Step 6: Final answer
    x = 453.78

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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.