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Finding the Fourth Proportional to 1,002.21, 1,383.36 and 609.51

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Solution

The fourth proportional to 1,002.21, 1,383.36 and 609.51 is: 841.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.21 : 1,383.36 = 609.51 : x
  2. Step 2: Convert to fraction form
    1,002.21/1,383.36 = 609.51/x
  3. Step 3: Cross multiply
    1,002.21x = 1,383.36 × 609.51
  4. Step 4: Simplify right side
    1,002.21x = 843,171.75
  5. Step 5: Solve for x
    x = 843,171.75/1,002.21
  6. Step 6: Final answer
    x = 841.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.