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Finding the Fourth Proportional to 1,007.26, 1,510.78 and 276.94

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Solution

The fourth proportional to 1,007.26, 1,510.78 and 276.94 is: 415.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.26 : 1,510.78 = 276.94 : x
  2. Step 2: Convert to fraction form
    1,007.26/1,510.78 = 276.94/x
  3. Step 3: Cross multiply
    1,007.26x = 1,510.78 × 276.94
  4. Step 4: Simplify right side
    1,007.26x = 418,395.41
  5. Step 5: Solve for x
    x = 418,395.41/1,007.26
  6. Step 6: Final answer
    x = 415.38

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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.