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Finding the Fourth Proportional to 893.25, 1,338.17 and 429.88

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Solution

The fourth proportional to 893.25, 1,338.17 and 429.88 is: 644.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.25 : 1,338.17 = 429.88 : x
  2. Step 2: Convert to fraction form
    893.25/1,338.17 = 429.88/x
  3. Step 3: Cross multiply
    893.25x = 1,338.17 × 429.88
  4. Step 4: Simplify right side
    893.25x = 575,255.72
  5. Step 5: Solve for x
    x = 575,255.72/893.25
  6. Step 6: Final answer
    x = 644.00

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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.