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Finding the Fourth Proportional to 1,029.26, 1,419.52 and 636.38

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Solution

The fourth proportional to 1,029.26, 1,419.52 and 636.38 is: 877.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.26 : 1,419.52 = 636.38 : x
  2. Step 2: Convert to fraction form
    1,029.26/1,419.52 = 636.38/x
  3. Step 3: Cross multiply
    1,029.26x = 1,419.52 × 636.38
  4. Step 4: Simplify right side
    1,029.26x = 903,354.14
  5. Step 5: Solve for x
    x = 903,354.14/1,029.26
  6. Step 6: Final answer
    x = 877.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.