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Finding the Fourth Proportional to 298.86, 448.56 and 217.50

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Solution

The fourth proportional to 298.86, 448.56 and 217.50 is: 326.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.86 : 448.56 = 217.50 : x
  2. Step 2: Convert to fraction form
    298.86/448.56 = 217.50/x
  3. Step 3: Cross multiply
    298.86x = 448.56 × 217.50
  4. Step 4: Simplify right side
    298.86x = 97,561.80
  5. Step 5: Solve for x
    x = 97,561.80/298.86
  6. Step 6: Final answer
    x = 326.45

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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.