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Finding the Fourth Proportional to 893.72, 1,339.88 and 346.38

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Solution

The fourth proportional to 893.72, 1,339.88 and 346.38 is: 519.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.72 : 1,339.88 = 346.38 : x
  2. Step 2: Convert to fraction form
    893.72/1,339.88 = 346.38/x
  3. Step 3: Cross multiply
    893.72x = 1,339.88 × 346.38
  4. Step 4: Simplify right side
    893.72x = 464,107.63
  5. Step 5: Solve for x
    x = 464,107.63/893.72
  6. Step 6: Final answer
    x = 519.30

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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.