Home / 1,080.93-1,621.65-387.66

Finding the Fourth Proportional to 1,080.93, 1,621.65 and 387.66

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Solution

The fourth proportional to 1,080.93, 1,621.65 and 387.66 is: 581.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.93 : 1,621.65 = 387.66 : x
  2. Step 2: Convert to fraction form
    1,080.93/1,621.65 = 387.66/x
  3. Step 3: Cross multiply
    1,080.93x = 1,621.65 × 387.66
  4. Step 4: Simplify right side
    1,080.93x = 628,648.84
  5. Step 5: Solve for x
    x = 628,648.84/1,080.93
  6. Step 6: Final answer
    x = 581.58

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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.