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Finding the Fourth Proportional to 387,101.20, 580,939.80 and 200,016.40

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Solution

The fourth proportional to 387,101.20, 580,939.80 and 200,016.40 is: 300,173.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,101.20 : 580,939.80 = 200,016.40 : x
  2. Step 2: Convert to fraction form
    387,101.20/580,939.80 = 200,016.40/x
  3. Step 3: Cross multiply
    387,101.20x = 580,939.80 × 200,016.40
  4. Step 4: Simplify right side
    387,101.20x = 116,197,487,412.72
  5. Step 5: Solve for x
    x = 116,197,487,412.72/387,101.20
  6. Step 6: Final answer
    x = 300,173.41

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1.5x scale

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.