Home / 1,080.60-1,619.82-430.44

Finding the Fourth Proportional to 1,080.60, 1,619.82 and 430.44

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Solution

The fourth proportional to 1,080.60, 1,619.82 and 430.44 is: 645.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.60 : 1,619.82 = 430.44 : x
  2. Step 2: Convert to fraction form
    1,080.60/1,619.82 = 430.44/x
  3. Step 3: Cross multiply
    1,080.60x = 1,619.82 × 430.44
  4. Step 4: Simplify right side
    1,080.60x = 697,235.32
  5. Step 5: Solve for x
    x = 697,235.32/1,080.60
  6. Step 6: Final answer
    x = 645.23

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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.