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Finding the Fourth Proportional to 386,797.38, 580,064.68 and 134,018.88

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Solution

The fourth proportional to 386,797.38, 580,064.68 and 134,018.88 is: 200,982.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,797.38 : 580,064.68 = 134,018.88 : x
  2. Step 2: Convert to fraction form
    386,797.38/580,064.68 = 134,018.88/x
  3. Step 3: Cross multiply
    386,797.38x = 580,064.68 × 134,018.88
  4. Step 4: Simplify right side
    386,797.38x = 77,739,618,741.16
  5. Step 5: Solve for x
    x = 77,739,618,741.16/386,797.38
  6. Step 6: Final answer
    x = 200,982.80

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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.