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Finding the Fourth Proportional to 490,885.80, 677,410.74 and 321,116.28

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Solution

The fourth proportional to 490,885.80, 677,410.74 and 321,116.28 is: 443,132.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,885.80 : 677,410.74 = 321,116.28 : x
  2. Step 2: Convert to fraction form
    490,885.80/677,410.74 = 321,116.28/x
  3. Step 3: Cross multiply
    490,885.80x = 677,410.74 × 321,116.28
  4. Step 4: Simplify right side
    490,885.80x = 217,527,616,860.85
  5. Step 5: Solve for x
    x = 217,527,616,860.85/490,885.80
  6. Step 6: Final answer
    x = 443,132.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.