Home / 1,485.40-2,228.76-512.20

Finding the Fourth Proportional to 1,485.40, 2,228.76 and 512.20

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Solution

The fourth proportional to 1,485.40, 2,228.76 and 512.20 is: 768.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.40 : 2,228.76 = 512.20 : x
  2. Step 2: Convert to fraction form
    1,485.40/2,228.76 = 512.20/x
  3. Step 3: Cross multiply
    1,485.40x = 2,228.76 × 512.20
  4. Step 4: Simplify right side
    1,485.40x = 1,141,570.87
  5. Step 5: Solve for x
    x = 1,141,570.87/1,485.40
  6. Step 6: Final answer
    x = 768.53

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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.