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Finding the Fourth Proportional to 1,080.70, 1,621.05 and 350.79

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Solution

The fourth proportional to 1,080.70, 1,621.05 and 350.79 is: 526.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.70 : 1,621.05 = 350.79 : x
  2. Step 2: Convert to fraction form
    1,080.70/1,621.05 = 350.79/x
  3. Step 3: Cross multiply
    1,080.70x = 1,621.05 × 350.79
  4. Step 4: Simplify right side
    1,080.70x = 568,640.02
  5. Step 5: Solve for x
    x = 568,640.02/1,080.70
  6. Step 6: Final answer
    x = 526.18

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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.