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Finding the Fourth Proportional to 1,048.81, 1,571.58 and 663.25

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Solution

The fourth proportional to 1,048.81, 1,571.58 and 663.25 is: 993.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.81 : 1,571.58 = 663.25 : x
  2. Step 2: Convert to fraction form
    1,048.81/1,571.58 = 663.25/x
  3. Step 3: Cross multiply
    1,048.81x = 1,571.58 × 663.25
  4. Step 4: Simplify right side
    1,048.81x = 1,042,350.44
  5. Step 5: Solve for x
    x = 1,042,350.44/1,048.81
  6. Step 6: Final answer
    x = 993.84

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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.