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Finding the Fourth Proportional to 840.73, 1,261.30 and 292.92

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Solution

The fourth proportional to 840.73, 1,261.30 and 292.92 is: 439.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.73 : 1,261.30 = 292.92 : x
  2. Step 2: Convert to fraction form
    840.73/1,261.30 = 292.92/x
  3. Step 3: Cross multiply
    840.73x = 1,261.30 × 292.92
  4. Step 4: Simplify right side
    840.73x = 369,453.69
  5. Step 5: Solve for x
    x = 369,453.69/840.73
  6. Step 6: Final answer
    x = 439.44

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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.