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Finding the Fourth Proportional to 368,439.80, 552,659.70 and 200,478.20

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Solution

The fourth proportional to 368,439.80, 552,659.70 and 200,478.20 is: 300,717.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,439.80 : 552,659.70 = 200,478.20 : x
  2. Step 2: Convert to fraction form
    368,439.80/552,659.70 = 200,478.20/x
  3. Step 3: Cross multiply
    368,439.80x = 552,659.70 × 200,478.20
  4. Step 4: Simplify right side
    368,439.80x = 110,796,221,868.54
  5. Step 5: Solve for x
    x = 110,796,221,868.54/368,439.80
  6. Step 6: Final answer
    x = 300,717.30

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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.