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Finding the Fourth Proportional to 590.82, 815.34 and 328.87

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Solution

The fourth proportional to 590.82, 815.34 and 328.87 is: 453.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.82 : 815.34 = 328.87 : x
  2. Step 2: Convert to fraction form
    590.82/815.34 = 328.87/x
  3. Step 3: Cross multiply
    590.82x = 815.34 × 328.87
  4. Step 4: Simplify right side
    590.82x = 268,140.87
  5. Step 5: Solve for x
    x = 268,140.87/590.82
  6. Step 6: Final answer
    x = 453.85

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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.