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Finding the Fourth Proportional to 309,392.50, 426,163.03 and 218,590.84

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Solution

The fourth proportional to 309,392.50, 426,163.03 and 218,590.84 is: 301,091.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,392.50 : 426,163.03 = 218,590.84 : x
  2. Step 2: Convert to fraction form
    309,392.50/426,163.03 = 218,590.84/x
  3. Step 3: Cross multiply
    309,392.50x = 426,163.03 × 218,590.84
  4. Step 4: Simplify right side
    309,392.50x = 93,155,333,611.69
  5. Step 5: Solve for x
    x = 93,155,333,611.69/309,392.50
  6. Step 6: Final answer
    x = 301,091.12

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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.