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Finding the Fourth Proportional to 1,336.16, 1,843.80 and 812.12

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Solution

The fourth proportional to 1,336.16, 1,843.80 and 812.12 is: 1,120.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.16 : 1,843.80 = 812.12 : x
  2. Step 2: Convert to fraction form
    1,336.16/1,843.80 = 812.12/x
  3. Step 3: Cross multiply
    1,336.16x = 1,843.80 × 812.12
  4. Step 4: Simplify right side
    1,336.16x = 1,497,386.86
  5. Step 5: Solve for x
    x = 1,497,386.86/1,336.16
  6. Step 6: Final answer
    x = 1,120.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.