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Finding the Fourth Proportional to 537.33, 742.68 and 390.99

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Solution

The fourth proportional to 537.33, 742.68 and 390.99 is: 540.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    537.33 : 742.68 = 390.99 : x
  2. Step 2: Convert to fraction form
    537.33/742.68 = 390.99/x
  3. Step 3: Cross multiply
    537.33x = 742.68 × 390.99
  4. Step 4: Simplify right side
    537.33x = 290,380.45
  5. Step 5: Solve for x
    x = 290,380.45/537.33
  6. Step 6: Final answer
    x = 540.41

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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.