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Finding the Fourth Proportional to 399,450.88, 551,239.36 and 218,162.80

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Solution

The fourth proportional to 399,450.88, 551,239.36 and 218,162.80 is: 301,063.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,450.88 : 551,239.36 = 218,162.80 : x
  2. Step 2: Convert to fraction form
    399,450.88/551,239.36 = 218,162.80/x
  3. Step 3: Cross multiply
    399,450.88x = 551,239.36 × 218,162.80
  4. Step 4: Simplify right side
    399,450.88x = 120,259,922,247.81
  5. Step 5: Solve for x
    x = 120,259,922,247.81/399,450.88
  6. Step 6: Final answer
    x = 301,063.11

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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.