Home / 1,890.97-2,609.60-1,145.07

Finding the Fourth Proportional to 1,890.97, 2,609.60 and 1,145.07

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Solution

The fourth proportional to 1,890.97, 2,609.60 and 1,145.07 is: 1,580.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.97 : 2,609.60 = 1,145.07 : x
  2. Step 2: Convert to fraction form
    1,890.97/2,609.60 = 1,145.07/x
  3. Step 3: Cross multiply
    1,890.97x = 2,609.60 × 1,145.07
  4. Step 4: Simplify right side
    1,890.97x = 2,988,155.90
  5. Step 5: Solve for x
    x = 2,988,155.90/1,890.97
  6. Step 6: Final answer
    x = 1,580.22

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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.