Home / 1,054.40-1,579.20-540.80

Finding the Fourth Proportional to 1,054.40, 1,579.20 and 540.80

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Solution

The fourth proportional to 1,054.40, 1,579.20 and 540.80 is: 809.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.40 : 1,579.20 = 540.80 : x
  2. Step 2: Convert to fraction form
    1,054.40/1,579.20 = 540.80/x
  3. Step 3: Cross multiply
    1,054.40x = 1,579.20 × 540.80
  4. Step 4: Simplify right side
    1,054.40x = 854,031.36
  5. Step 5: Solve for x
    x = 854,031.36/1,054.40
  6. Step 6: Final answer
    x = 809.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.