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Finding the Fourth Proportional to 1,261.66, 1,893.04 and 439.49

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Solution

The fourth proportional to 1,261.66, 1,893.04 and 439.49 is: 659.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.66 : 1,893.04 = 439.49 : x
  2. Step 2: Convert to fraction form
    1,261.66/1,893.04 = 439.49/x
  3. Step 3: Cross multiply
    1,261.66x = 1,893.04 × 439.49
  4. Step 4: Simplify right side
    1,261.66x = 831,972.15
  5. Step 5: Solve for x
    x = 831,972.15/1,261.66
  6. Step 6: Final answer
    x = 659.43

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Double scale
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1.5x scale

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.