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Finding the Fourth Proportional to 757.14, 1,135.74 and 392.64

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Solution

The fourth proportional to 757.14, 1,135.74 and 392.64 is: 588.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.14 : 1,135.74 = 392.64 : x
  2. Step 2: Convert to fraction form
    757.14/1,135.74 = 392.64/x
  3. Step 3: Cross multiply
    757.14x = 1,135.74 × 392.64
  4. Step 4: Simplify right side
    757.14x = 445,936.95
  5. Step 5: Solve for x
    x = 445,936.95/757.14
  6. Step 6: Final answer
    x = 588.98

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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.