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Finding the Fourth Proportional to 420,410.40, 630,615.60 and 199,226.40

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Solution

The fourth proportional to 420,410.40, 630,615.60 and 199,226.40 is: 298,839.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,410.40 : 630,615.60 = 199,226.40 : x
  2. Step 2: Convert to fraction form
    420,410.40/630,615.60 = 199,226.40/x
  3. Step 3: Cross multiply
    420,410.40x = 630,615.60 × 199,226.40
  4. Step 4: Simplify right side
    420,410.40x = 125,635,275,771.84
  5. Step 5: Solve for x
    x = 125,635,275,771.84/420,410.40
  6. Step 6: Final answer
    x = 298,839.60

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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.