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Finding the Fourth Proportional to 369.36, 554.16 and 215.60

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Solution

The fourth proportional to 369.36, 554.16 and 215.60 is: 323.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.36 : 554.16 = 215.60 : x
  2. Step 2: Convert to fraction form
    369.36/554.16 = 215.60/x
  3. Step 3: Cross multiply
    369.36x = 554.16 × 215.60
  4. Step 4: Simplify right side
    369.36x = 119,476.90
  5. Step 5: Solve for x
    x = 119,476.90/369.36
  6. Step 6: Final answer
    x = 323.47

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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.