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Finding the Fourth Proportional to 842.15, 1,263.15 and 294.35

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Solution

The fourth proportional to 842.15, 1,263.15 and 294.35 is: 441.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.15 : 1,263.15 = 294.35 : x
  2. Step 2: Convert to fraction form
    842.15/1,263.15 = 294.35/x
  3. Step 3: Cross multiply
    842.15x = 1,263.15 × 294.35
  4. Step 4: Simplify right side
    842.15x = 371,801.89
  5. Step 5: Solve for x
    x = 371,801.89/842.15
  6. Step 6: Final answer
    x = 441.49

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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.