Home / 1,784.20-2,675.88-485.36

Finding the Fourth Proportional to 1,784.20, 2,675.88 and 485.36

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Solution

The fourth proportional to 1,784.20, 2,675.88 and 485.36 is: 727.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,784.20 : 2,675.88 = 485.36 : x
  2. Step 2: Convert to fraction form
    1,784.20/2,675.88 = 485.36/x
  3. Step 3: Cross multiply
    1,784.20x = 2,675.88 × 485.36
  4. Step 4: Simplify right side
    1,784.20x = 1,298,765.12
  5. Step 5: Solve for x
    x = 1,298,765.12/1,784.20
  6. Step 6: Final answer
    x = 727.93

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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.