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Finding the Fourth Proportional to 1,131.06, 1,696.62 and 553.80

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Solution

The fourth proportional to 1,131.06, 1,696.62 and 553.80 is: 830.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.06 : 1,696.62 = 553.80 : x
  2. Step 2: Convert to fraction form
    1,131.06/1,696.62 = 553.80/x
  3. Step 3: Cross multiply
    1,131.06x = 1,696.62 × 553.80
  4. Step 4: Simplify right side
    1,131.06x = 939,588.16
  5. Step 5: Solve for x
    x = 939,588.16/1,131.06
  6. Step 6: Final answer
    x = 830.71

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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.