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Finding the Fourth Proportional to 1,131.12, 1,696.56 and 447.12

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Solution

The fourth proportional to 1,131.12, 1,696.56 and 447.12 is: 670.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.12 : 1,696.56 = 447.12 : x
  2. Step 2: Convert to fraction form
    1,131.12/1,696.56 = 447.12/x
  3. Step 3: Cross multiply
    1,131.12x = 1,696.56 × 447.12
  4. Step 4: Simplify right side
    1,131.12x = 758,565.91
  5. Step 5: Solve for x
    x = 758,565.91/1,131.12
  6. Step 6: Final answer
    x = 670.63

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1.5x scale

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.