Home / 320,823.20-481,234.80-221,290.40

Finding the Fourth Proportional to 320,823.20, 481,234.80 and 221,290.40

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Solution

The fourth proportional to 320,823.20, 481,234.80 and 221,290.40 is: 331,935.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,823.20 : 481,234.80 = 221,290.40 : x
  2. Step 2: Convert to fraction form
    320,823.20/481,234.80 = 221,290.40/x
  3. Step 3: Cross multiply
    320,823.20x = 481,234.80 × 221,290.40
  4. Step 4: Simplify right side
    320,823.20x = 106,492,641,385.92
  5. Step 5: Solve for x
    x = 106,492,641,385.92/320,823.20
  6. Step 6: Final answer
    x = 331,935.60

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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.