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Finding the Fourth Proportional to 374.51, 561.39 and 155.30

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Solution

The fourth proportional to 374.51, 561.39 and 155.30 is: 232.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.51 : 561.39 = 155.30 : x
  2. Step 2: Convert to fraction form
    374.51/561.39 = 155.30/x
  3. Step 3: Cross multiply
    374.51x = 561.39 × 155.30
  4. Step 4: Simplify right side
    374.51x = 87,183.64
  5. Step 5: Solve for x
    x = 87,183.64/374.51
  6. Step 6: Final answer
    x = 232.79

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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.