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Finding the Fourth Proportional to 1,007.81, 1,511.74 and 277.39

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Solution

The fourth proportional to 1,007.81, 1,511.74 and 277.39 is: 416.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.81 : 1,511.74 = 277.39 : x
  2. Step 2: Convert to fraction form
    1,007.81/1,511.74 = 277.39/x
  3. Step 3: Cross multiply
    1,007.81x = 1,511.74 × 277.39
  4. Step 4: Simplify right side
    1,007.81x = 419,334.00
  5. Step 5: Solve for x
    x = 419,334.00/1,007.81
  6. Step 6: Final answer
    x = 416.09

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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.