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Finding the Fourth Proportional to 1,034.69, 1,551.43 and 418.42

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Solution

The fourth proportional to 1,034.69, 1,551.43 and 418.42 is: 627.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,034.69 : 1,551.43 = 418.42 : x
  2. Step 2: Convert to fraction form
    1,034.69/1,551.43 = 418.42/x
  3. Step 3: Cross multiply
    1,034.69x = 1,551.43 × 418.42
  4. Step 4: Simplify right side
    1,034.69x = 649,149.34
  5. Step 5: Solve for x
    x = 649,149.34/1,034.69
  6. Step 6: Final answer
    x = 627.39

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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.