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Finding the Fourth Proportional to 277.02, 415.56 and 139.98

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Solution

The fourth proportional to 277.02, 415.56 and 139.98 is: 209.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.02 : 415.56 = 139.98 : x
  2. Step 2: Convert to fraction form
    277.02/415.56 = 139.98/x
  3. Step 3: Cross multiply
    277.02x = 415.56 × 139.98
  4. Step 4: Simplify right side
    277.02x = 58,171.65
  5. Step 5: Solve for x
    x = 58,171.65/277.02
  6. Step 6: Final answer
    x = 209.99

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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.