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Finding the Fourth Proportional to 886.37, 1,330.26 and 399.46

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Solution

The fourth proportional to 886.37, 1,330.26 and 399.46 is: 599.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.37 : 1,330.26 = 399.46 : x
  2. Step 2: Convert to fraction form
    886.37/1,330.26 = 399.46/x
  3. Step 3: Cross multiply
    886.37x = 1,330.26 × 399.46
  4. Step 4: Simplify right side
    886.37x = 531,382.33
  5. Step 5: Solve for x
    x = 531,382.33/886.37
  6. Step 6: Final answer
    x = 599.50

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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.