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Finding the Fourth Proportional to 1,382.87, 1,905.73 and 1,295.19

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Solution

The fourth proportional to 1,382.87, 1,905.73 and 1,295.19 is: 1,784.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.87 : 1,905.73 = 1,295.19 : x
  2. Step 2: Convert to fraction form
    1,382.87/1,905.73 = 1,295.19/x
  3. Step 3: Cross multiply
    1,382.87x = 1,905.73 × 1,295.19
  4. Step 4: Simplify right side
    1,382.87x = 2,468,279.20
  5. Step 5: Solve for x
    x = 2,468,279.20/1,382.87
  6. Step 6: Final answer
    x = 1,784.89

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1.5x scale

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.