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Finding the Fourth Proportional to 886.83, 1,330.24 and 399.31

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Solution

The fourth proportional to 886.83, 1,330.24 and 399.31 is: 598.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.83 : 1,330.24 = 399.31 : x
  2. Step 2: Convert to fraction form
    886.83/1,330.24 = 399.31/x
  3. Step 3: Cross multiply
    886.83x = 1,330.24 × 399.31
  4. Step 4: Simplify right side
    886.83x = 531,178.13
  5. Step 5: Solve for x
    x = 531,178.13/886.83
  6. Step 6: Final answer
    x = 598.97

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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.