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Finding the Fourth Proportional to 1,365.21, 2,047.86 and 487.44

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Solution

The fourth proportional to 1,365.21, 2,047.86 and 487.44 is: 731.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,365.21 : 2,047.86 = 487.44 : x
  2. Step 2: Convert to fraction form
    1,365.21/2,047.86 = 487.44/x
  3. Step 3: Cross multiply
    1,365.21x = 2,047.86 × 487.44
  4. Step 4: Simplify right side
    1,365.21x = 998,208.88
  5. Step 5: Solve for x
    x = 998,208.88/1,365.21
  6. Step 6: Final answer
    x = 731.18

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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.