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Finding the Fourth Proportional to 391.25, 582.43 and 373.55

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Solution

The fourth proportional to 391.25, 582.43 and 373.55 is: 556.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.25 : 582.43 = 373.55 : x
  2. Step 2: Convert to fraction form
    391.25/582.43 = 373.55/x
  3. Step 3: Cross multiply
    391.25x = 582.43 × 373.55
  4. Step 4: Simplify right side
    391.25x = 217,566.73
  5. Step 5: Solve for x
    x = 217,566.73/391.25
  6. Step 6: Final answer
    x = 556.08

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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.