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Finding the Fourth Proportional to 1,353.51, 1,867.92 and 756

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Solution

The fourth proportional to 1,353.51, 1,867.92 and 756 is: 1,043.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.51 : 1,867.92 = 756 : x
  2. Step 2: Convert to fraction form
    1,353.51/1,867.92 = 756/x
  3. Step 3: Cross multiply
    1,353.51x = 1,867.92 × 756
  4. Step 4: Simplify right side
    1,353.51x = 1,412,150.36
  5. Step 5: Solve for x
    x = 1,412,150.36/1,353.51
  6. Step 6: Final answer
    x = 1,043.32

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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.