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Finding the Fourth Proportional to 1,407.62, 1,956.14 and 1,392.60

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Solution

The fourth proportional to 1,407.62, 1,956.14 and 1,392.60 is: 1,935.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.62 : 1,956.14 = 1,392.60 : x
  2. Step 2: Convert to fraction form
    1,407.62/1,956.14 = 1,392.60/x
  3. Step 3: Cross multiply
    1,407.62x = 1,956.14 × 1,392.60
  4. Step 4: Simplify right side
    1,407.62x = 2,724,120.56
  5. Step 5: Solve for x
    x = 2,724,120.56/1,407.62
  6. Step 6: Final answer
    x = 1,935.27

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.