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Finding the Fourth Proportional to 401,020.20, 601,530.30 and 398,255.40

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Solution

The fourth proportional to 401,020.20, 601,530.30 and 398,255.40 is: 597,383.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,020.20 : 601,530.30 = 398,255.40 : x
  2. Step 2: Convert to fraction form
    401,020.20/601,530.30 = 398,255.40/x
  3. Step 3: Cross multiply
    401,020.20x = 601,530.30 × 398,255.40
  4. Step 4: Simplify right side
    401,020.20x = 239,562,690,238.62
  5. Step 5: Solve for x
    x = 239,562,690,238.62/401,020.20
  6. Step 6: Final answer
    x = 597,383.10

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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.