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Finding the Fourth Proportional to 1,951.52, 2,693.90 and 1,392.08

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Solution

The fourth proportional to 1,951.52, 2,693.90 and 1,392.08 is: 1,921.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,951.52 : 2,693.90 = 1,392.08 : x
  2. Step 2: Convert to fraction form
    1,951.52/2,693.90 = 1,392.08/x
  3. Step 3: Cross multiply
    1,951.52x = 2,693.90 × 1,392.08
  4. Step 4: Simplify right side
    1,951.52x = 3,750,124.31
  5. Step 5: Solve for x
    x = 3,750,124.31/1,951.52
  6. Step 6: Final answer
    x = 1,921.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.