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Finding the Fourth Proportional to 1,228.20, 1,840.52 and 570.28

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Solution

The fourth proportional to 1,228.20, 1,840.52 and 570.28 is: 854.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.20 : 1,840.52 = 570.28 : x
  2. Step 2: Convert to fraction form
    1,228.20/1,840.52 = 570.28/x
  3. Step 3: Cross multiply
    1,228.20x = 1,840.52 × 570.28
  4. Step 4: Simplify right side
    1,228.20x = 1,049,611.75
  5. Step 5: Solve for x
    x = 1,049,611.75/1,228.20
  6. Step 6: Final answer
    x = 854.59

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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.