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Finding the Fourth Proportional to 770.51, 1,155.60 and 222.57

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Solution

The fourth proportional to 770.51, 1,155.60 and 222.57 is: 333.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.51 : 1,155.60 = 222.57 : x
  2. Step 2: Convert to fraction form
    770.51/1,155.60 = 222.57/x
  3. Step 3: Cross multiply
    770.51x = 1,155.60 × 222.57
  4. Step 4: Simplify right side
    770.51x = 257,200.78
  5. Step 5: Solve for x
    x = 257,200.78/770.51
  6. Step 6: Final answer
    x = 333.81

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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.