Home / 1,485.90-2,229.39-512.28

Finding the Fourth Proportional to 1,485.90, 2,229.39 and 512.28

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Solution

The fourth proportional to 1,485.90, 2,229.39 and 512.28 is: 768.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.90 : 2,229.39 = 512.28 : x
  2. Step 2: Convert to fraction form
    1,485.90/2,229.39 = 512.28/x
  3. Step 3: Cross multiply
    1,485.90x = 2,229.39 × 512.28
  4. Step 4: Simplify right side
    1,485.90x = 1,142,071.91
  5. Step 5: Solve for x
    x = 1,142,071.91/1,485.90
  6. Step 6: Final answer
    x = 768.61

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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.