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Finding the Fourth Proportional to 2,456.79, 3,683.07 and 812.88

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Solution

The fourth proportional to 2,456.79, 3,683.07 and 812.88 is: 1,218.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,456.79 : 3,683.07 = 812.88 : x
  2. Step 2: Convert to fraction form
    2,456.79/3,683.07 = 812.88/x
  3. Step 3: Cross multiply
    2,456.79x = 3,683.07 × 812.88
  4. Step 4: Simplify right side
    2,456.79x = 2,993,893.94
  5. Step 5: Solve for x
    x = 2,993,893.94/2,456.79
  6. Step 6: Final answer
    x = 1,218.62

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1.5x scale

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.