Home / 1,485.16-2,228.30-664.20

Finding the Fourth Proportional to 1,485.16, 2,228.30 and 664.20

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Solution

The fourth proportional to 1,485.16, 2,228.30 and 664.20 is: 996.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.16 : 2,228.30 = 664.20 : x
  2. Step 2: Convert to fraction form
    1,485.16/2,228.30 = 664.20/x
  3. Step 3: Cross multiply
    1,485.16x = 2,228.30 × 664.20
  4. Step 4: Simplify right side
    1,485.16x = 1,480,036.86
  5. Step 5: Solve for x
    x = 1,480,036.86/1,485.16
  6. Step 6: Final answer
    x = 996.55

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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.