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Finding the Fourth Proportional to 1,852.31, 2,778.70 and 620.61

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Solution

The fourth proportional to 1,852.31, 2,778.70 and 620.61 is: 930.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,852.31 : 2,778.70 = 620.61 : x
  2. Step 2: Convert to fraction form
    1,852.31/2,778.70 = 620.61/x
  3. Step 3: Cross multiply
    1,852.31x = 2,778.70 × 620.61
  4. Step 4: Simplify right side
    1,852.31x = 1,724,472.01
  5. Step 5: Solve for x
    x = 1,724,472.01/1,852.31
  6. Step 6: Final answer
    x = 930.98

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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.