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Finding the Fourth Proportional to 842.42, 1,263.74 and 294.73

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Solution

The fourth proportional to 842.42, 1,263.74 and 294.73 is: 442.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.42 : 1,263.74 = 294.73 : x
  2. Step 2: Convert to fraction form
    842.42/1,263.74 = 294.73/x
  3. Step 3: Cross multiply
    842.42x = 1,263.74 × 294.73
  4. Step 4: Simplify right side
    842.42x = 372,457.46
  5. Step 5: Solve for x
    x = 372,457.46/842.42
  6. Step 6: Final answer
    x = 442.13

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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.