Home / 2,905.40-4,011.72-1,786.85

Finding the Fourth Proportional to 2,905.40, 4,011.72 and 1,786.85

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Solution

The fourth proportional to 2,905.40, 4,011.72 and 1,786.85 is: 2,467.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,905.40 : 4,011.72 = 1,786.85 : x
  2. Step 2: Convert to fraction form
    2,905.40/4,011.72 = 1,786.85/x
  3. Step 3: Cross multiply
    2,905.40x = 4,011.72 × 1,786.85
  4. Step 4: Simplify right side
    2,905.40x = 7,168,321.82
  5. Step 5: Solve for x
    x = 7,168,321.82/2,905.40
  6. Step 6: Final answer
    x = 2,467.25

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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.