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Finding the Fourth Proportional to 1,295.32, 1,785.72 and 996.96

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Solution

The fourth proportional to 1,295.32, 1,785.72 and 996.96 is: 1,374.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.32 : 1,785.72 = 996.96 : x
  2. Step 2: Convert to fraction form
    1,295.32/1,785.72 = 996.96/x
  3. Step 3: Cross multiply
    1,295.32x = 1,785.72 × 996.96
  4. Step 4: Simplify right side
    1,295.32x = 1,780,291.41
  5. Step 5: Solve for x
    x = 1,780,291.41/1,295.32
  6. Step 6: Final answer
    x = 1,374.40

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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.