Home / 1,578.80-2,179.36-1,054.64

Finding the Fourth Proportional to 1,578.80, 2,179.36 and 1,054.64

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Solution

The fourth proportional to 1,578.80, 2,179.36 and 1,054.64 is: 1,455.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.80 : 2,179.36 = 1,054.64 : x
  2. Step 2: Convert to fraction form
    1,578.80/2,179.36 = 1,054.64/x
  3. Step 3: Cross multiply
    1,578.80x = 2,179.36 × 1,054.64
  4. Step 4: Simplify right side
    1,578.80x = 2,298,440.23
  5. Step 5: Solve for x
    x = 2,298,440.23/1,578.80
  6. Step 6: Final answer
    x = 1,455.81

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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.