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Finding the Fourth Proportional to 395.81, 590.58 and 393.52

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Solution

The fourth proportional to 395.81, 590.58 and 393.52 is: 587.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.81 : 590.58 = 393.52 : x
  2. Step 2: Convert to fraction form
    395.81/590.58 = 393.52/x
  3. Step 3: Cross multiply
    395.81x = 590.58 × 393.52
  4. Step 4: Simplify right side
    395.81x = 232,402.09
  5. Step 5: Solve for x
    x = 232,402.09/395.81
  6. Step 6: Final answer
    x = 587.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.