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Finding the Fourth Proportional to 884.90, 1,326.99 and 397.82

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Solution

The fourth proportional to 884.90, 1,326.99 and 397.82 is: 596.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.90 : 1,326.99 = 397.82 : x
  2. Step 2: Convert to fraction form
    884.90/1,326.99 = 397.82/x
  3. Step 3: Cross multiply
    884.90x = 1,326.99 × 397.82
  4. Step 4: Simplify right side
    884.90x = 527,903.16
  5. Step 5: Solve for x
    x = 527,903.16/884.90
  6. Step 6: Final answer
    x = 596.57

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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.