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Finding the Fourth Proportional to 590.55, 815.00 and 328.58

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Solution

The fourth proportional to 590.55, 815.00 and 328.58 is: 453.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.55 : 815.00 = 328.58 : x
  2. Step 2: Convert to fraction form
    590.55/815.00 = 328.58/x
  3. Step 3: Cross multiply
    590.55x = 815.00 × 328.58
  4. Step 4: Simplify right side
    590.55x = 267,786.98
  5. Step 5: Solve for x
    x = 267,786.98/590.55
  6. Step 6: Final answer
    x = 453.45

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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.