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Finding the Fourth Proportional to 770.24, 1,162.20 and 741.78

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Solution

The fourth proportional to 770.24, 1,162.20 and 741.78 is: 1,119.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.24 : 1,162.20 = 741.78 : x
  2. Step 2: Convert to fraction form
    770.24/1,162.20 = 741.78/x
  3. Step 3: Cross multiply
    770.24x = 1,162.20 × 741.78
  4. Step 4: Simplify right side
    770.24x = 862,096.72
  5. Step 5: Solve for x
    x = 862,096.72/770.24
  6. Step 6: Final answer
    x = 1,119.26

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.