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Finding the Fourth Proportional to 893.25, 1,339.58 and 399.35

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Solution

The fourth proportional to 893.25, 1,339.58 and 399.35 is: 598.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.25 : 1,339.58 = 399.35 : x
  2. Step 2: Convert to fraction form
    893.25/1,339.58 = 399.35/x
  3. Step 3: Cross multiply
    893.25x = 1,339.58 × 399.35
  4. Step 4: Simplify right side
    893.25x = 534,952.58
  5. Step 5: Solve for x
    x = 534,952.58/893.25
  6. Step 6: Final answer
    x = 598.88

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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.