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Finding the Fourth Proportional to 967.74, 1,450.26 and 419.55

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Solution

The fourth proportional to 967.74, 1,450.26 and 419.55 is: 628.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    967.74 : 1,450.26 = 419.55 : x
  2. Step 2: Convert to fraction form
    967.74/1,450.26 = 419.55/x
  3. Step 3: Cross multiply
    967.74x = 1,450.26 × 419.55
  4. Step 4: Simplify right side
    967.74x = 608,456.58
  5. Step 5: Solve for x
    x = 608,456.58/967.74
  6. Step 6: Final answer
    x = 628.74

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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.