Home / 353,380.20-486,433.53-307,980.13

Finding the Fourth Proportional to 353,380.20, 486,433.53 and 307,980.13

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Solution

The fourth proportional to 353,380.20, 486,433.53 and 307,980.13 is: 423,939.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,380.20 : 486,433.53 = 307,980.13 : x
  2. Step 2: Convert to fraction form
    353,380.20/486,433.53 = 307,980.13/x
  3. Step 3: Cross multiply
    353,380.20x = 486,433.53 × 307,980.13
  4. Step 4: Simplify right side
    353,380.20x = 149,811,861,805.76
  5. Step 5: Solve for x
    x = 149,811,861,805.76/353,380.20
  6. Step 6: Final answer
    x = 423,939.60

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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.