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Finding the Fourth Proportional to 368.07, 507.97 and 321.15

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Solution

The fourth proportional to 368.07, 507.97 and 321.15 is: 443.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.07 : 507.97 = 321.15 : x
  2. Step 2: Convert to fraction form
    368.07/507.97 = 321.15/x
  3. Step 3: Cross multiply
    368.07x = 507.97 × 321.15
  4. Step 4: Simplify right side
    368.07x = 163,134.57
  5. Step 5: Solve for x
    x = 163,134.57/368.07
  6. Step 6: Final answer
    x = 443.22

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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.