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Finding the Fourth Proportional to 775.91, 1,070.80 and 481.37

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Solution

The fourth proportional to 775.91, 1,070.80 and 481.37 is: 664.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.91 : 1,070.80 = 481.37 : x
  2. Step 2: Convert to fraction form
    775.91/1,070.80 = 481.37/x
  3. Step 3: Cross multiply
    775.91x = 1,070.80 × 481.37
  4. Step 4: Simplify right side
    775.91x = 515,451.00
  5. Step 5: Solve for x
    x = 515,451.00/775.91
  6. Step 6: Final answer
    x = 664.32

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.