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Finding the Fourth Proportional to 1,112.38, 1,669.25 and 756.99

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Solution

The fourth proportional to 1,112.38, 1,669.25 and 756.99 is: 1,135.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.38 : 1,669.25 = 756.99 : x
  2. Step 2: Convert to fraction form
    1,112.38/1,669.25 = 756.99/x
  3. Step 3: Cross multiply
    1,112.38x = 1,669.25 × 756.99
  4. Step 4: Simplify right side
    1,112.38x = 1,263,607.45
  5. Step 5: Solve for x
    x = 1,263,607.45/1,112.38
  6. Step 6: Final answer
    x = 1,135.95

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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.