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Finding the Fourth Proportional to 813.37, 1,122.10 and 481.81

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Solution

The fourth proportional to 813.37, 1,122.10 and 481.81 is: 664.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.37 : 1,122.10 = 481.81 : x
  2. Step 2: Convert to fraction form
    813.37/1,122.10 = 481.81/x
  3. Step 3: Cross multiply
    813.37x = 1,122.10 × 481.81
  4. Step 4: Simplify right side
    813.37x = 540,639.00
  5. Step 5: Solve for x
    x = 540,639.00/813.37
  6. Step 6: Final answer
    x = 664.69

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Half scale
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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.