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Finding the Fourth Proportional to 1,008.07, 1,512.11 and 277.65

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Solution

The fourth proportional to 1,008.07, 1,512.11 and 277.65 is: 416.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.07 : 1,512.11 = 277.65 : x
  2. Step 2: Convert to fraction form
    1,008.07/1,512.11 = 277.65/x
  3. Step 3: Cross multiply
    1,008.07x = 1,512.11 × 277.65
  4. Step 4: Simplify right side
    1,008.07x = 419,830.77
  5. Step 5: Solve for x
    x = 419,830.77/1,008.07
  6. Step 6: Final answer
    x = 416.47

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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.