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Finding the Fourth Proportional to 1,634.65, 2,452.75 and 812.70

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Solution

The fourth proportional to 1,634.65, 2,452.75 and 812.70 is: 1,219.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,634.65 : 2,452.75 = 812.70 : x
  2. Step 2: Convert to fraction form
    1,634.65/2,452.75 = 812.70/x
  3. Step 3: Cross multiply
    1,634.65x = 2,452.75 × 812.70
  4. Step 4: Simplify right side
    1,634.65x = 1,993,347.89
  5. Step 5: Solve for x
    x = 1,993,347.89/1,634.65
  6. Step 6: Final answer
    x = 1,219.44

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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.