Home / 1,755.44-2,631.64-780.80

Finding the Fourth Proportional to 1,755.44, 2,631.64 and 780.80

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Solution

The fourth proportional to 1,755.44, 2,631.64 and 780.80 is: 1,170.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,755.44 : 2,631.64 = 780.80 : x
  2. Step 2: Convert to fraction form
    1,755.44/2,631.64 = 780.80/x
  3. Step 3: Cross multiply
    1,755.44x = 2,631.64 × 780.80
  4. Step 4: Simplify right side
    1,755.44x = 2,054,784.51
  5. Step 5: Solve for x
    x = 2,054,784.51/1,755.44
  6. Step 6: Final answer
    x = 1,170.52

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1.5x scale

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.