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Finding the Fourth Proportional to 2,455.78, 3,683.04 and 724

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Solution

The fourth proportional to 2,455.78, 3,683.04 and 724 is: 1,085.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,455.78 : 3,683.04 = 724 : x
  2. Step 2: Convert to fraction form
    2,455.78/3,683.04 = 724/x
  3. Step 3: Cross multiply
    2,455.78x = 3,683.04 × 724
  4. Step 4: Simplify right side
    2,455.78x = 2,666,520.96
  5. Step 5: Solve for x
    x = 2,666,520.96/2,455.78
  6. Step 6: Final answer
    x = 1,085.81

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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.