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Finding the Fourth Proportional to 1,131.21, 1,696.80 and 583.08

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Solution

The fourth proportional to 1,131.21, 1,696.80 and 583.08 is: 874.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.21 : 1,696.80 = 583.08 : x
  2. Step 2: Convert to fraction form
    1,131.21/1,696.80 = 583.08/x
  3. Step 3: Cross multiply
    1,131.21x = 1,696.80 × 583.08
  4. Step 4: Simplify right side
    1,131.21x = 989,370.14
  5. Step 5: Solve for x
    x = 989,370.14/1,131.21
  6. Step 6: Final answer
    x = 874.61

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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.