Home / 1,080.25-1,621.99-618.55

Finding the Fourth Proportional to 1,080.25, 1,621.99 and 618.55

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Solution

The fourth proportional to 1,080.25, 1,621.99 and 618.55 is: 928.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.25 : 1,621.99 = 618.55 : x
  2. Step 2: Convert to fraction form
    1,080.25/1,621.99 = 618.55/x
  3. Step 3: Cross multiply
    1,080.25x = 1,621.99 × 618.55
  4. Step 4: Simplify right side
    1,080.25x = 1,003,272.26
  5. Step 5: Solve for x
    x = 1,003,272.26/1,080.25
  6. Step 6: Final answer
    x = 928.75

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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.