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Finding the Fourth Proportional to 1,069.90, 1,604.31 and 376.45

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Solution

The fourth proportional to 1,069.90, 1,604.31 and 376.45 is: 564.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.90 : 1,604.31 = 376.45 : x
  2. Step 2: Convert to fraction form
    1,069.90/1,604.31 = 376.45/x
  3. Step 3: Cross multiply
    1,069.90x = 1,604.31 × 376.45
  4. Step 4: Simplify right side
    1,069.90x = 603,942.50
  5. Step 5: Solve for x
    x = 603,942.50/1,069.90
  6. Step 6: Final answer
    x = 564.48

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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.