Home / 2,805.20-4,206.12-857.04

Finding the Fourth Proportional to 2,805.20, 4,206.12 and 857.04

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Solution

The fourth proportional to 2,805.20, 4,206.12 and 857.04 is: 1,285.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,805.20 : 4,206.12 = 857.04 : x
  2. Step 2: Convert to fraction form
    2,805.20/4,206.12 = 857.04/x
  3. Step 3: Cross multiply
    2,805.20x = 4,206.12 × 857.04
  4. Step 4: Simplify right side
    2,805.20x = 3,604,813.08
  5. Step 5: Solve for x
    x = 3,604,813.08/2,805.20
  6. Step 6: Final answer
    x = 1,285.05

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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.