Home / 1,054.08-1,581.84-780.88

Finding the Fourth Proportional to 1,054.08, 1,581.84 and 780.88

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Solution

The fourth proportional to 1,054.08, 1,581.84 and 780.88 is: 1,171.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.08 : 1,581.84 = 780.88 : x
  2. Step 2: Convert to fraction form
    1,054.08/1,581.84 = 780.88/x
  3. Step 3: Cross multiply
    1,054.08x = 1,581.84 × 780.88
  4. Step 4: Simplify right side
    1,054.08x = 1,235,227.22
  5. Step 5: Solve for x
    x = 1,235,227.22/1,054.08
  6. Step 6: Final answer
    x = 1,171.85

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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.