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Finding the Fourth Proportional to 590.60, 815.00 and 394.08

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Solution

The fourth proportional to 590.60, 815.00 and 394.08 is: 543.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.60 : 815.00 = 394.08 : x
  2. Step 2: Convert to fraction form
    590.60/815.00 = 394.08/x
  3. Step 3: Cross multiply
    590.60x = 815.00 × 394.08
  4. Step 4: Simplify right side
    590.60x = 321,173.23
  5. Step 5: Solve for x
    x = 321,173.23/590.60
  6. Step 6: Final answer
    x = 543.81

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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.