Home / 426,975.12-640,531.80-131,418

Finding the Fourth Proportional to 426,975.12, 640,531.80 and 131,418

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Solution

The fourth proportional to 426,975.12, 640,531.80 and 131,418 is: 197,148.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,975.12 : 640,531.80 = 131,418 : x
  2. Step 2: Convert to fraction form
    426,975.12/640,531.80 = 131,418/x
  3. Step 3: Cross multiply
    426,975.12x = 640,531.80 × 131,418
  4. Step 4: Simplify right side
    426,975.12x = 84,177,408,092.40
  5. Step 5: Solve for x
    x = 84,177,408,092.40/426,975.12
  6. Step 6: Final answer
    x = 197,148.27

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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.