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Finding the Fourth Proportional to 1,261.37, 1,892.24 and 439.53

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Solution

The fourth proportional to 1,261.37, 1,892.24 and 439.53 is: 659.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.37 : 1,892.24 = 439.53 : x
  2. Step 2: Convert to fraction form
    1,261.37/1,892.24 = 439.53/x
  3. Step 3: Cross multiply
    1,261.37x = 1,892.24 × 439.53
  4. Step 4: Simplify right side
    1,261.37x = 831,684.59
  5. Step 5: Solve for x
    x = 831,684.59/1,261.37
  6. Step 6: Final answer
    x = 659.35

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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.