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Finding the Fourth Proportional to 370.83, 556.49 and 255.61

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Solution

The fourth proportional to 370.83, 556.49 and 255.61 is: 383.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.83 : 556.49 = 255.61 : x
  2. Step 2: Convert to fraction form
    370.83/556.49 = 255.61/x
  3. Step 3: Cross multiply
    370.83x = 556.49 × 255.61
  4. Step 4: Simplify right side
    370.83x = 142,244.41
  5. Step 5: Solve for x
    x = 142,244.41/370.83
  6. Step 6: Final answer
    x = 383.58

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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.