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Finding the Fourth Proportional to 886.69, 1,330.04 and 399.88

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Solution

The fourth proportional to 886.69, 1,330.04 and 399.88 is: 599.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.69 : 1,330.04 = 399.88 : x
  2. Step 2: Convert to fraction form
    886.69/1,330.04 = 399.88/x
  3. Step 3: Cross multiply
    886.69x = 1,330.04 × 399.88
  4. Step 4: Simplify right side
    886.69x = 531,851.07
  5. Step 5: Solve for x
    x = 531,851.07/886.69
  6. Step 6: Final answer
    x = 599.82

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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.