Home / 1,551.03-2,141.40-1,078.80

Finding the Fourth Proportional to 1,551.03, 2,141.40 and 1,078.80

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Solution

The fourth proportional to 1,551.03, 2,141.40 and 1,078.80 is: 1,489.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.03 : 2,141.40 = 1,078.80 : x
  2. Step 2: Convert to fraction form
    1,551.03/2,141.40 = 1,078.80/x
  3. Step 3: Cross multiply
    1,551.03x = 2,141.40 × 1,078.80
  4. Step 4: Simplify right side
    1,551.03x = 2,310,142.32
  5. Step 5: Solve for x
    x = 2,310,142.32/1,551.03
  6. Step 6: Final answer
    x = 1,489.42

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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.