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Finding the Fourth Proportional to 700.24, 1,049.40 and 443.28

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Solution

The fourth proportional to 700.24, 1,049.40 and 443.28 is: 664.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.24 : 1,049.40 = 443.28 : x
  2. Step 2: Convert to fraction form
    700.24/1,049.40 = 443.28/x
  3. Step 3: Cross multiply
    700.24x = 1,049.40 × 443.28
  4. Step 4: Simplify right side
    700.24x = 465,178.03
  5. Step 5: Solve for x
    x = 465,178.03/700.24
  6. Step 6: Final answer
    x = 664.31

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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.