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Finding the Fourth Proportional to 842.23, 1,263.34 and 608.95

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Solution

The fourth proportional to 842.23, 1,263.34 and 608.95 is: 913.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.23 : 1,263.34 = 608.95 : x
  2. Step 2: Convert to fraction form
    842.23/1,263.34 = 608.95/x
  3. Step 3: Cross multiply
    842.23x = 1,263.34 × 608.95
  4. Step 4: Simplify right side
    842.23x = 769,313.23
  5. Step 5: Solve for x
    x = 769,313.23/842.23
  6. Step 6: Final answer
    x = 913.42

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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.