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Finding the Fourth Proportional to 387,295.81, 580,705.88 and 134,467.67

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Solution

The fourth proportional to 387,295.81, 580,705.88 and 134,467.67 is: 201,618.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,295.81 : 580,705.88 = 134,467.67 : x
  2. Step 2: Convert to fraction form
    387,295.81/580,705.88 = 134,467.67/x
  3. Step 3: Cross multiply
    387,295.81x = 580,705.88 × 134,467.67
  4. Step 4: Simplify right side
    387,295.81x = 78,086,167,418.33
  5. Step 5: Solve for x
    x = 78,086,167,418.33/387,295.81
  6. Step 6: Final answer
    x = 201,618.93

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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.