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Finding the Fourth Proportional to 770.82, 1,063.34 and 522.21

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Solution

The fourth proportional to 770.82, 1,063.34 and 522.21 is: 720.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.82 : 1,063.34 = 522.21 : x
  2. Step 2: Convert to fraction form
    770.82/1,063.34 = 522.21/x
  3. Step 3: Cross multiply
    770.82x = 1,063.34 × 522.21
  4. Step 4: Simplify right side
    770.82x = 555,284.17
  5. Step 5: Solve for x
    x = 555,284.17/770.82
  6. Step 6: Final answer
    x = 720.38

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Double scale
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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.