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Finding the Fourth Proportional to 390.07, 539.22 and 367.12

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Solution

The fourth proportional to 390.07, 539.22 and 367.12 is: 507.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.07 : 539.22 = 367.12 : x
  2. Step 2: Convert to fraction form
    390.07/539.22 = 367.12/x
  3. Step 3: Cross multiply
    390.07x = 539.22 × 367.12
  4. Step 4: Simplify right side
    390.07x = 197,958.45
  5. Step 5: Solve for x
    x = 197,958.45/390.07
  6. Step 6: Final answer
    x = 507.49

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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.