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Finding the Fourth Proportional to 374.15, 561.21 and 272.63

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Solution

The fourth proportional to 374.15, 561.21 and 272.63 is: 408.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.15 : 561.21 = 272.63 : x
  2. Step 2: Convert to fraction form
    374.15/561.21 = 272.63/x
  3. Step 3: Cross multiply
    374.15x = 561.21 × 272.63
  4. Step 4: Simplify right side
    374.15x = 153,002.68
  5. Step 5: Solve for x
    x = 153,002.68/374.15
  6. Step 6: Final answer
    x = 408.93

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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.