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Finding the Fourth Proportional to 391.59, 537.15 and 383.49

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Solution

The fourth proportional to 391.59, 537.15 and 383.49 is: 526.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.59 : 537.15 = 383.49 : x
  2. Step 2: Convert to fraction form
    391.59/537.15 = 383.49/x
  3. Step 3: Cross multiply
    391.59x = 537.15 × 383.49
  4. Step 4: Simplify right side
    391.59x = 205,991.65
  5. Step 5: Solve for x
    x = 205,991.65/391.59
  6. Step 6: Final answer
    x = 526.04

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.