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Finding the Fourth Proportional to 277.91, 416.47 and 154.57

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Solution

The fourth proportional to 277.91, 416.47 and 154.57 is: 231.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.91 : 416.47 = 154.57 : x
  2. Step 2: Convert to fraction form
    277.91/416.47 = 154.57/x
  3. Step 3: Cross multiply
    277.91x = 416.47 × 154.57
  4. Step 4: Simplify right side
    277.91x = 64,373.77
  5. Step 5: Solve for x
    x = 64,373.77/277.91
  6. Step 6: Final answer
    x = 231.64

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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.