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Finding the Fourth Proportional to 305.57, 458.43 and 123.09

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Solution

The fourth proportional to 305.57, 458.43 and 123.09 is: 184.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.57 : 458.43 = 123.09 : x
  2. Step 2: Convert to fraction form
    305.57/458.43 = 123.09/x
  3. Step 3: Cross multiply
    305.57x = 458.43 × 123.09
  4. Step 4: Simplify right side
    305.57x = 56,430.87
  5. Step 5: Solve for x
    x = 56,430.87/305.57
  6. Step 6: Final answer
    x = 184.67

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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.