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Finding the Fourth Proportional to 1,172.35, 1,758.97 and 556.57

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Solution

The fourth proportional to 1,172.35, 1,758.97 and 556.57 is: 835.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.35 : 1,758.97 = 556.57 : x
  2. Step 2: Convert to fraction form
    1,172.35/1,758.97 = 556.57/x
  3. Step 3: Cross multiply
    1,172.35x = 1,758.97 × 556.57
  4. Step 4: Simplify right side
    1,172.35x = 978,992.83
  5. Step 5: Solve for x
    x = 978,992.83/1,172.35
  6. Step 6: Final answer
    x = 835.07

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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.