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Finding the Fourth Proportional to 1,231.70, 1,847.55 and 583.70

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Solution

The fourth proportional to 1,231.70, 1,847.55 and 583.70 is: 875.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.70 : 1,847.55 = 583.70 : x
  2. Step 2: Convert to fraction form
    1,231.70/1,847.55 = 583.70/x
  3. Step 3: Cross multiply
    1,231.70x = 1,847.55 × 583.70
  4. Step 4: Simplify right side
    1,231.70x = 1,078,414.94
  5. Step 5: Solve for x
    x = 1,078,414.94/1,231.70
  6. Step 6: Final answer
    x = 875.55

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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.