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Finding the Fourth Proportional to 391.98, 590.93 and 365.55

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Solution

The fourth proportional to 391.98, 590.93 and 365.55 is: 551.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.98 : 590.93 = 365.55 : x
  2. Step 2: Convert to fraction form
    391.98/590.93 = 365.55/x
  3. Step 3: Cross multiply
    391.98x = 590.93 × 365.55
  4. Step 4: Simplify right side
    391.98x = 216,012.63
  5. Step 5: Solve for x
    x = 216,012.63/391.98
  6. Step 6: Final answer
    x = 551.08

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.