Home / 419,708.90-629,749.66-219,981.80

Finding the Fourth Proportional to 419,708.90, 629,749.66 and 219,981.80

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Solution

The fourth proportional to 419,708.90, 629,749.66 and 219,981.80 is: 330,070.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,708.90 : 629,749.66 = 219,981.80 : x
  2. Step 2: Convert to fraction form
    419,708.90/629,749.66 = 219,981.80/x
  3. Step 3: Cross multiply
    419,708.90x = 629,749.66 × 219,981.80
  4. Step 4: Simplify right side
    419,708.90x = 138,533,463,756.19
  5. Step 5: Solve for x
    x = 138,533,463,756.19/419,708.90
  6. Step 6: Final answer
    x = 330,070.35

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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.