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Finding the Fourth Proportional to 374.26, 561.18 and 143.08

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Solution

The fourth proportional to 374.26, 561.18 and 143.08 is: 214.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.26 : 561.18 = 143.08 : x
  2. Step 2: Convert to fraction form
    374.26/561.18 = 143.08/x
  3. Step 3: Cross multiply
    374.26x = 561.18 × 143.08
  4. Step 4: Simplify right side
    374.26x = 80,292.92
  5. Step 5: Solve for x
    x = 80,292.92/374.26
  6. Step 6: Final answer
    x = 214.54

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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.