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Finding the Fourth Proportional to 961.98, 1,442.64 and 376.94

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Solution

The fourth proportional to 961.98, 1,442.64 and 376.94 is: 565.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.98 : 1,442.64 = 376.94 : x
  2. Step 2: Convert to fraction form
    961.98/1,442.64 = 376.94/x
  3. Step 3: Cross multiply
    961.98x = 1,442.64 × 376.94
  4. Step 4: Simplify right side
    961.98x = 543,788.72
  5. Step 5: Solve for x
    x = 543,788.72/961.98
  6. Step 6: Final answer
    x = 565.28

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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.