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Finding the Fourth Proportional to 770.98, 1,063.96 and 439.41

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Solution

The fourth proportional to 770.98, 1,063.96 and 439.41 is: 606.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.98 : 1,063.96 = 439.41 : x
  2. Step 2: Convert to fraction form
    770.98/1,063.96 = 439.41/x
  3. Step 3: Cross multiply
    770.98x = 1,063.96 × 439.41
  4. Step 4: Simplify right side
    770.98x = 467,514.66
  5. Step 5: Solve for x
    x = 467,514.66/770.98
  6. Step 6: Final answer
    x = 606.39

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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.