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Finding the Fourth Proportional to 774.68, 1,162.62 and 342.14

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Solution

The fourth proportional to 774.68, 1,162.62 and 342.14 is: 513.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.68 : 1,162.62 = 342.14 : x
  2. Step 2: Convert to fraction form
    774.68/1,162.62 = 342.14/x
  3. Step 3: Cross multiply
    774.68x = 1,162.62 × 342.14
  4. Step 4: Simplify right side
    774.68x = 397,778.81
  5. Step 5: Solve for x
    x = 397,778.81/774.68
  6. Step 6: Final answer
    x = 513.47

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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.