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Finding the Fourth Proportional to 2,287.44, 3,431.36 and 643.98

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Solution

The fourth proportional to 2,287.44, 3,431.36 and 643.98 is: 966.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,287.44 : 3,431.36 = 643.98 : x
  2. Step 2: Convert to fraction form
    2,287.44/3,431.36 = 643.98/x
  3. Step 3: Cross multiply
    2,287.44x = 3,431.36 × 643.98
  4. Step 4: Simplify right side
    2,287.44x = 2,209,741.69
  5. Step 5: Solve for x
    x = 2,209,741.69/2,287.44
  6. Step 6: Final answer
    x = 966.03

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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.