Home / 1,322.30-1,987.95-1,080.58

Finding the Fourth Proportional to 1,322.30, 1,987.95 and 1,080.58

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Solution

The fourth proportional to 1,322.30, 1,987.95 and 1,080.58 is: 1,624.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.30 : 1,987.95 = 1,080.58 : x
  2. Step 2: Convert to fraction form
    1,322.30/1,987.95 = 1,080.58/x
  3. Step 3: Cross multiply
    1,322.30x = 1,987.95 × 1,080.58
  4. Step 4: Simplify right side
    1,322.30x = 2,148,139.01
  5. Step 5: Solve for x
    x = 2,148,139.01/1,322.30
  6. Step 6: Final answer
    x = 1,624.55

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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.