Home / 399,336.28-551,085.26-218,049.80

Finding the Fourth Proportional to 399,336.28, 551,085.26 and 218,049.80

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Solution

The fourth proportional to 399,336.28, 551,085.26 and 218,049.80 is: 300,909.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,336.28 : 551,085.26 = 218,049.80 : x
  2. Step 2: Convert to fraction form
    399,336.28/551,085.26 = 218,049.80/x
  3. Step 3: Cross multiply
    399,336.28x = 551,085.26 × 218,049.80
  4. Step 4: Simplify right side
    399,336.28x = 120,164,030,725.95
  5. Step 5: Solve for x
    x = 120,164,030,725.95/399,336.28
  6. Step 6: Final answer
    x = 300,909.38

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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.