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Finding the Fourth Proportional to 756.84, 1,135.62 and 372

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Solution

The fourth proportional to 756.84, 1,135.62 and 372 is: 558.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.84 : 1,135.62 = 372 : x
  2. Step 2: Convert to fraction form
    756.84/1,135.62 = 372/x
  3. Step 3: Cross multiply
    756.84x = 1,135.62 × 372
  4. Step 4: Simplify right side
    756.84x = 422,450.64
  5. Step 5: Solve for x
    x = 422,450.64/756.84
  6. Step 6: Final answer
    x = 558.18

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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.