Home / 309,128.09-426,223.49-240,237.59

Finding the Fourth Proportional to 309,128.09, 426,223.49 and 240,237.59

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Solution

The fourth proportional to 309,128.09, 426,223.49 and 240,237.59 is: 331,237.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,128.09 : 426,223.49 = 240,237.59 : x
  2. Step 2: Convert to fraction form
    309,128.09/426,223.49 = 240,237.59/x
  3. Step 3: Cross multiply
    309,128.09x = 426,223.49 × 240,237.59
  4. Step 4: Simplify right side
    309,128.09x = 102,394,900,706.68
  5. Step 5: Solve for x
    x = 102,394,900,706.68/309,128.09
  6. Step 6: Final answer
    x = 331,237.78

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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.