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Finding the Fourth Proportional to 368.15, 507.91 and 220.75

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Solution

The fourth proportional to 368.15, 507.91 and 220.75 is: 304.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.15 : 507.91 = 220.75 : x
  2. Step 2: Convert to fraction form
    368.15/507.91 = 220.75/x
  3. Step 3: Cross multiply
    368.15x = 507.91 × 220.75
  4. Step 4: Simplify right side
    368.15x = 112,120.84
  5. Step 5: Solve for x
    x = 112,120.84/368.15
  6. Step 6: Final answer
    x = 304.56

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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.