Home / 1,890.12-2,607.52-1,103.80

Finding the Fourth Proportional to 1,890.12, 2,607.52 and 1,103.80

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Solution

The fourth proportional to 1,890.12, 2,607.52 and 1,103.80 is: 1,522.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.12 : 2,607.52 = 1,103.80 : x
  2. Step 2: Convert to fraction form
    1,890.12/2,607.52 = 1,103.80/x
  3. Step 3: Cross multiply
    1,890.12x = 2,607.52 × 1,103.80
  4. Step 4: Simplify right side
    1,890.12x = 2,878,180.58
  5. Step 5: Solve for x
    x = 2,878,180.58/1,890.12
  6. Step 6: Final answer
    x = 1,522.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.