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Finding the Fourth Proportional to 277.55, 383.00 and 153.21

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Solution

The fourth proportional to 277.55, 383.00 and 153.21 is: 211.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.55 : 383.00 = 153.21 : x
  2. Step 2: Convert to fraction form
    277.55/383.00 = 153.21/x
  3. Step 3: Cross multiply
    277.55x = 383.00 × 153.21
  4. Step 4: Simplify right side
    277.55x = 58,679.81
  5. Step 5: Solve for x
    x = 58,679.81/277.55
  6. Step 6: Final answer
    x = 211.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.