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Finding the Fourth Proportional to 390.08, 537.36 and 333.88

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Solution

The fourth proportional to 390.08, 537.36 and 333.88 is: 459.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.08 : 537.36 = 333.88 : x
  2. Step 2: Convert to fraction form
    390.08/537.36 = 333.88/x
  3. Step 3: Cross multiply
    390.08x = 537.36 × 333.88
  4. Step 4: Simplify right side
    390.08x = 179,413.76
  5. Step 5: Solve for x
    x = 179,413.76/390.08
  6. Step 6: Final answer
    x = 459.94

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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.