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Finding the Fourth Proportional to 1,275.51, 1,912.86 and 544.68

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Solution

The fourth proportional to 1,275.51, 1,912.86 and 544.68 is: 816.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.51 : 1,912.86 = 544.68 : x
  2. Step 2: Convert to fraction form
    1,275.51/1,912.86 = 544.68/x
  3. Step 3: Cross multiply
    1,275.51x = 1,912.86 × 544.68
  4. Step 4: Simplify right side
    1,275.51x = 1,041,896.58
  5. Step 5: Solve for x
    x = 1,041,896.58/1,275.51
  6. Step 6: Final answer
    x = 816.85

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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.