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Finding the Fourth Proportional to 374.35, 561.45 and 143.08

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Solution

The fourth proportional to 374.35, 561.45 and 143.08 is: 214.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.35 : 561.45 = 143.08 : x
  2. Step 2: Convert to fraction form
    374.35/561.45 = 143.08/x
  3. Step 3: Cross multiply
    374.35x = 561.45 × 143.08
  4. Step 4: Simplify right side
    374.35x = 80,332.27
  5. Step 5: Solve for x
    x = 80,332.27/374.35
  6. Step 6: Final answer
    x = 214.59

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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.