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Finding the Fourth Proportional to 1,336.48, 1,844.70 and 812.68

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Solution

The fourth proportional to 1,336.48, 1,844.70 and 812.68 is: 1,121.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.48 : 1,844.70 = 812.68 : x
  2. Step 2: Convert to fraction form
    1,336.48/1,844.70 = 812.68/x
  3. Step 3: Cross multiply
    1,336.48x = 1,844.70 × 812.68
  4. Step 4: Simplify right side
    1,336.48x = 1,499,150.80
  5. Step 5: Solve for x
    x = 1,499,150.80/1,336.48
  6. Step 6: Final answer
    x = 1,121.72

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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.