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Finding the Fourth Proportional to 756.99, 1,135.71 and 270.08

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Solution

The fourth proportional to 756.99, 1,135.71 and 270.08 is: 405.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.99 : 1,135.71 = 270.08 : x
  2. Step 2: Convert to fraction form
    756.99/1,135.71 = 270.08/x
  3. Step 3: Cross multiply
    756.99x = 1,135.71 × 270.08
  4. Step 4: Simplify right side
    756.99x = 306,732.56
  5. Step 5: Solve for x
    x = 306,732.56/756.99
  6. Step 6: Final answer
    x = 405.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.