Home / 1,080.31-1,619.89-349.80

Finding the Fourth Proportional to 1,080.31, 1,619.89 and 349.80

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Solution

The fourth proportional to 1,080.31, 1,619.89 and 349.80 is: 524.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.31 : 1,619.89 = 349.80 : x
  2. Step 2: Convert to fraction form
    1,080.31/1,619.89 = 349.80/x
  3. Step 3: Cross multiply
    1,080.31x = 1,619.89 × 349.80
  4. Step 4: Simplify right side
    1,080.31x = 566,637.52
  5. Step 5: Solve for x
    x = 566,637.52/1,080.31
  6. Step 6: Final answer
    x = 524.51

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Double scale
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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.