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Finding the Fourth Proportional to 443.03, 610.43 and 316.89

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Solution

The fourth proportional to 443.03, 610.43 and 316.89 is: 436.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.03 : 610.43 = 316.89 : x
  2. Step 2: Convert to fraction form
    443.03/610.43 = 316.89/x
  3. Step 3: Cross multiply
    443.03x = 610.43 × 316.89
  4. Step 4: Simplify right side
    443.03x = 193,437.58
  5. Step 5: Solve for x
    x = 193,437.58/443.03
  6. Step 6: Final answer
    x = 436.63

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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.