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Finding the Fourth Proportional to 842.68, 1,263.50 and 348.94

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Solution

The fourth proportional to 842.68, 1,263.50 and 348.94 is: 523.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.68 : 1,263.50 = 348.94 : x
  2. Step 2: Convert to fraction form
    842.68/1,263.50 = 348.94/x
  3. Step 3: Cross multiply
    842.68x = 1,263.50 × 348.94
  4. Step 4: Simplify right side
    842.68x = 440,885.69
  5. Step 5: Solve for x
    x = 440,885.69/842.68
  6. Step 6: Final answer
    x = 523.19

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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.