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Finding the Fourth Proportional to 2,455.66, 3,683.54 and 812.35

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Solution

The fourth proportional to 2,455.66, 3,683.54 and 812.35 is: 1,218.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,455.66 : 3,683.54 = 812.35 : x
  2. Step 2: Convert to fraction form
    2,455.66/3,683.54 = 812.35/x
  3. Step 3: Cross multiply
    2,455.66x = 3,683.54 × 812.35
  4. Step 4: Simplify right side
    2,455.66x = 2,992,323.72
  5. Step 5: Solve for x
    x = 2,992,323.72/2,455.66
  6. Step 6: Final answer
    x = 1,218.54

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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.