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Finding the Fourth Proportional to 770, 1,154.96 and 222.12

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Solution

The fourth proportional to 770, 1,154.96 and 222.12 is: 333.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    770 : 1,154.96 = 222.12 : x
  2. Step 2: Convert to fraction form
    770/1,154.96 = 222.12/x
  3. Step 3: Cross multiply
    770x = 1,154.96 × 222.12
  4. Step 4: Simplify right side
    770x = 256,539.72
  5. Step 5: Solve for x
    x = 256,539.72/770
  6. Step 6: Final answer
    x = 333.17

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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.