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Finding the Fourth Proportional to 774.77, 1,162.35 and 342.23

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Solution

The fourth proportional to 774.77, 1,162.35 and 342.23 is: 513.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.77 : 1,162.35 = 342.23 : x
  2. Step 2: Convert to fraction form
    774.77/1,162.35 = 342.23/x
  3. Step 3: Cross multiply
    774.77x = 1,162.35 × 342.23
  4. Step 4: Simplify right side
    774.77x = 397,785.23
  5. Step 5: Solve for x
    x = 397,785.23/774.77
  6. Step 6: Final answer
    x = 513.43

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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.