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Finding the Fourth Proportional to 369.36, 509.49 and 319.95

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Solution

The fourth proportional to 369.36, 509.49 and 319.95 is: 441.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.36 : 509.49 = 319.95 : x
  2. Step 2: Convert to fraction form
    369.36/509.49 = 319.95/x
  3. Step 3: Cross multiply
    369.36x = 509.49 × 319.95
  4. Step 4: Simplify right side
    369.36x = 163,011.33
  5. Step 5: Solve for x
    x = 163,011.33/369.36
  6. Step 6: Final answer
    x = 441.33

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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.