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Finding the Fourth Proportional to 1,086.81, 1,630.22 and 469.64

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Solution

The fourth proportional to 1,086.81, 1,630.22 and 469.64 is: 704.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.81 : 1,630.22 = 469.64 : x
  2. Step 2: Convert to fraction form
    1,086.81/1,630.22 = 469.64/x
  3. Step 3: Cross multiply
    1,086.81x = 1,630.22 × 469.64
  4. Step 4: Simplify right side
    1,086.81x = 765,606.02
  5. Step 5: Solve for x
    x = 765,606.02/1,086.81
  6. Step 6: Final answer
    x = 704.45

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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.