Home / 3,012.30-4,518.06-821.19

Finding the Fourth Proportional to 3,012.30, 4,518.06 and 821.19

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Solution

The fourth proportional to 3,012.30, 4,518.06 and 821.19 is: 1,231.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,012.30 : 4,518.06 = 821.19 : x
  2. Step 2: Convert to fraction form
    3,012.30/4,518.06 = 821.19/x
  3. Step 3: Cross multiply
    3,012.30x = 4,518.06 × 821.19
  4. Step 4: Simplify right side
    3,012.30x = 3,710,185.69
  5. Step 5: Solve for x
    x = 3,710,185.69/3,012.30
  6. Step 6: Final answer
    x = 1,231.68

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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.