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Finding the Fourth Proportional to 369.26, 553.71 and 259.70

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Solution

The fourth proportional to 369.26, 553.71 and 259.70 is: 389.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.26 : 553.71 = 259.70 : x
  2. Step 2: Convert to fraction form
    369.26/553.71 = 259.70/x
  3. Step 3: Cross multiply
    369.26x = 553.71 × 259.70
  4. Step 4: Simplify right side
    369.26x = 143,798.49
  5. Step 5: Solve for x
    x = 143,798.49/369.26
  6. Step 6: Final answer
    x = 389.42

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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.