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Finding the Fourth Proportional to 774.80, 1,162.21 and 197.68

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Solution

The fourth proportional to 774.80, 1,162.21 and 197.68 is: 296.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.80 : 1,162.21 = 197.68 : x
  2. Step 2: Convert to fraction form
    774.80/1,162.21 = 197.68/x
  3. Step 3: Cross multiply
    774.80x = 1,162.21 × 197.68
  4. Step 4: Simplify right side
    774.80x = 229,741.78
  5. Step 5: Solve for x
    x = 229,741.78/774.80
  6. Step 6: Final answer
    x = 296.52

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Double scale
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1.5x scale

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.