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Finding the Fourth Proportional to 1,007.82, 1,511.70 and 277.29

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Solution

The fourth proportional to 1,007.82, 1,511.70 and 277.29 is: 415.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.82 : 1,511.70 = 277.29 : x
  2. Step 2: Convert to fraction form
    1,007.82/1,511.70 = 277.29/x
  3. Step 3: Cross multiply
    1,007.82x = 1,511.70 × 277.29
  4. Step 4: Simplify right side
    1,007.82x = 419,179.29
  5. Step 5: Solve for x
    x = 419,179.29/1,007.82
  6. Step 6: Final answer
    x = 415.93

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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.