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Finding the Fourth Proportional to 1,443.72, 2,165.44 and 469.84

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Solution

The fourth proportional to 1,443.72, 2,165.44 and 469.84 is: 704.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,443.72 : 2,165.44 = 469.84 : x
  2. Step 2: Convert to fraction form
    1,443.72/2,165.44 = 469.84/x
  3. Step 3: Cross multiply
    1,443.72x = 2,165.44 × 469.84
  4. Step 4: Simplify right side
    1,443.72x = 1,017,410.33
  5. Step 5: Solve for x
    x = 1,017,410.33/1,443.72
  6. Step 6: Final answer
    x = 704.71

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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.