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Finding the Fourth Proportional to 1,830.40, 2,745.78 and 531.88

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Solution

The fourth proportional to 1,830.40, 2,745.78 and 531.88 is: 797.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,830.40 : 2,745.78 = 531.88 : x
  2. Step 2: Convert to fraction form
    1,830.40/2,745.78 = 531.88/x
  3. Step 3: Cross multiply
    1,830.40x = 2,745.78 × 531.88
  4. Step 4: Simplify right side
    1,830.40x = 1,460,425.47
  5. Step 5: Solve for x
    x = 1,460,425.47/1,830.40
  6. Step 6: Final answer
    x = 797.87

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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.