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Finding the Fourth Proportional to 277.55, 382.99 and 153.20

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Solution

The fourth proportional to 277.55, 382.99 and 153.20 is: 211.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.55 : 382.99 = 153.20 : x
  2. Step 2: Convert to fraction form
    277.55/382.99 = 153.20/x
  3. Step 3: Cross multiply
    277.55x = 382.99 × 153.20
  4. Step 4: Simplify right side
    277.55x = 58,674.07
  5. Step 5: Solve for x
    x = 58,674.07/277.55
  6. Step 6: Final answer
    x = 211.40

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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.