Home / 2,005.40-3,005.70-1,491.80

Finding the Fourth Proportional to 2,005.40, 3,005.70 and 1,491.80

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Solution

The fourth proportional to 2,005.40, 3,005.70 and 1,491.80 is: 2,235.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,005.40 : 3,005.70 = 1,491.80 : x
  2. Step 2: Convert to fraction form
    2,005.40/3,005.70 = 1,491.80/x
  3. Step 3: Cross multiply
    2,005.40x = 3,005.70 × 1,491.80
  4. Step 4: Simplify right side
    2,005.40x = 4,483,903.26
  5. Step 5: Solve for x
    x = 4,483,903.26/2,005.40
  6. Step 6: Final answer
    x = 2,235.91

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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.