Home / 1,485.90-2,228.94-620.28

Finding the Fourth Proportional to 1,485.90, 2,228.94 and 620.28

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Solution

The fourth proportional to 1,485.90, 2,228.94 and 620.28 is: 930.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.90 : 2,228.94 = 620.28 : x
  2. Step 2: Convert to fraction form
    1,485.90/2,228.94 = 620.28/x
  3. Step 3: Cross multiply
    1,485.90x = 2,228.94 × 620.28
  4. Step 4: Simplify right side
    1,485.90x = 1,382,566.90
  5. Step 5: Solve for x
    x = 1,382,566.90/1,485.90
  6. Step 6: Final answer
    x = 930.46

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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.