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Finding the Fourth Proportional to 1,784.94, 2,672.54 and 1,388.24

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Solution

The fourth proportional to 1,784.94, 2,672.54 and 1,388.24 is: 2,078.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,784.94 : 2,672.54 = 1,388.24 : x
  2. Step 2: Convert to fraction form
    1,784.94/2,672.54 = 1,388.24/x
  3. Step 3: Cross multiply
    1,784.94x = 2,672.54 × 1,388.24
  4. Step 4: Simplify right side
    1,784.94x = 3,710,126.93
  5. Step 5: Solve for x
    x = 3,710,126.93/1,784.94
  6. Step 6: Final answer
    x = 2,078.57

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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.