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Finding the Fourth Proportional to 1,211.40, 1,814.40 and 935.33

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Solution

The fourth proportional to 1,211.40, 1,814.40 and 935.33 is: 1,400.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.40 : 1,814.40 = 935.33 : x
  2. Step 2: Convert to fraction form
    1,211.40/1,814.40 = 935.33/x
  3. Step 3: Cross multiply
    1,211.40x = 1,814.40 × 935.33
  4. Step 4: Simplify right side
    1,211.40x = 1,697,053.68
  5. Step 5: Solve for x
    x = 1,697,053.68/1,211.40
  6. Step 6: Final answer
    x = 1,400.90

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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.