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Finding the Fourth Proportional to 443.48, 611.71 and 303.35

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Solution

The fourth proportional to 443.48, 611.71 and 303.35 is: 418.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.48 : 611.71 = 303.35 : x
  2. Step 2: Convert to fraction form
    443.48/611.71 = 303.35/x
  3. Step 3: Cross multiply
    443.48x = 611.71 × 303.35
  4. Step 4: Simplify right side
    443.48x = 185,562.71
  5. Step 5: Solve for x
    x = 185,562.71/443.48
  6. Step 6: Final answer
    x = 418.42

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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.