Home / 1,799.12-2,479.80-1,238.64

Finding the Fourth Proportional to 1,799.12, 2,479.80 and 1,238.64

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Solution

The fourth proportional to 1,799.12, 2,479.80 and 1,238.64 is: 1,707.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,799.12 : 2,479.80 = 1,238.64 : x
  2. Step 2: Convert to fraction form
    1,799.12/2,479.80 = 1,238.64/x
  3. Step 3: Cross multiply
    1,799.12x = 2,479.80 × 1,238.64
  4. Step 4: Simplify right side
    1,799.12x = 3,071,579.47
  5. Step 5: Solve for x
    x = 3,071,579.47/1,799.12
  6. Step 6: Final answer
    x = 1,707.27

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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.