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Finding the Fourth Proportional to 638,511.08, 957,738.94 and 158,728.84

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Solution

The fourth proportional to 638,511.08, 957,738.94 and 158,728.84 is: 238,086.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,511.08 : 957,738.94 = 158,728.84 : x
  2. Step 2: Convert to fraction form
    638,511.08/957,738.94 = 158,728.84/x
  3. Step 3: Cross multiply
    638,511.08x = 957,738.94 × 158,728.84
  4. Step 4: Simplify right side
    638,511.08x = 152,020,790,871.50
  5. Step 5: Solve for x
    x = 152,020,790,871.50/638,511.08
  6. Step 6: Final answer
    x = 238,086.38

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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.