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Finding the Fourth Proportional to 841.08, 1,261.44 and 285.73

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Solution

The fourth proportional to 841.08, 1,261.44 and 285.73 is: 428.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.08 : 1,261.44 = 285.73 : x
  2. Step 2: Convert to fraction form
    841.08/1,261.44 = 285.73/x
  3. Step 3: Cross multiply
    841.08x = 1,261.44 × 285.73
  4. Step 4: Simplify right side
    841.08x = 360,431.25
  5. Step 5: Solve for x
    x = 360,431.25/841.08
  6. Step 6: Final answer
    x = 428.53

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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.