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Finding the Fourth Proportional to 305.86, 458.22 and 190

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Solution

The fourth proportional to 305.86, 458.22 and 190 is: 284.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.86 : 458.22 = 190 : x
  2. Step 2: Convert to fraction form
    305.86/458.22 = 190/x
  3. Step 3: Cross multiply
    305.86x = 458.22 × 190
  4. Step 4: Simplify right side
    305.86x = 87,061.80
  5. Step 5: Solve for x
    x = 87,061.80/305.86
  6. Step 6: Final answer
    x = 284.65

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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.