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Finding the Fourth Proportional to 774.99, 1,162.49 and 342.03

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Solution

The fourth proportional to 774.99, 1,162.49 and 342.03 is: 513.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.99 : 1,162.49 = 342.03 : x
  2. Step 2: Convert to fraction form
    774.99/1,162.49 = 342.03/x
  3. Step 3: Cross multiply
    774.99x = 1,162.49 × 342.03
  4. Step 4: Simplify right side
    774.99x = 397,604.74
  5. Step 5: Solve for x
    x = 397,604.74/774.99
  6. Step 6: Final answer
    x = 513.05

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Double scale
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Similar ratio
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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.