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Finding the Fourth Proportional to 1,485.83, 2,228.43 and 512.01

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Solution

The fourth proportional to 1,485.83, 2,228.43 and 512.01 is: 767.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.83 : 2,228.43 = 512.01 : x
  2. Step 2: Convert to fraction form
    1,485.83/2,228.43 = 512.01/x
  3. Step 3: Cross multiply
    1,485.83x = 2,228.43 × 512.01
  4. Step 4: Simplify right side
    1,485.83x = 1,140,978.44
  5. Step 5: Solve for x
    x = 1,140,978.44/1,485.83
  6. Step 6: Final answer
    x = 767.91

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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.