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Finding the Fourth Proportional to 389.21, 583.23 and 183.74

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Solution

The fourth proportional to 389.21, 583.23 and 183.74 is: 275.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.21 : 583.23 = 183.74 : x
  2. Step 2: Convert to fraction form
    389.21/583.23 = 183.74/x
  3. Step 3: Cross multiply
    389.21x = 583.23 × 183.74
  4. Step 4: Simplify right side
    389.21x = 107,160.45
  5. Step 5: Solve for x
    x = 107,160.45/389.21
  6. Step 6: Final answer
    x = 275.33

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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.