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Finding the Fourth Proportional to 775.36, 1,163.18 and 255.51

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Solution

The fourth proportional to 775.36, 1,163.18 and 255.51 is: 383.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.36 : 1,163.18 = 255.51 : x
  2. Step 2: Convert to fraction form
    775.36/1,163.18 = 255.51/x
  3. Step 3: Cross multiply
    775.36x = 1,163.18 × 255.51
  4. Step 4: Simplify right side
    775.36x = 297,204.76
  5. Step 5: Solve for x
    x = 297,204.76/775.36
  6. Step 6: Final answer
    x = 383.31

Related Problems

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Half scale
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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.