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Finding the Fourth Proportional to 1,101.26, 1,651.63 and 321.05

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Solution

The fourth proportional to 1,101.26, 1,651.63 and 321.05 is: 481.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.26 : 1,651.63 = 321.05 : x
  2. Step 2: Convert to fraction form
    1,101.26/1,651.63 = 321.05/x
  3. Step 3: Cross multiply
    1,101.26x = 1,651.63 × 321.05
  4. Step 4: Simplify right side
    1,101.26x = 530,254.21
  5. Step 5: Solve for x
    x = 530,254.21/1,101.26
  6. Step 6: Final answer
    x = 481.50

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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.