Home / 420,780.68-631,034.70-140,222.60

Finding the Fourth Proportional to 420,780.68, 631,034.70 and 140,222.60

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Solution

The fourth proportional to 420,780.68, 631,034.70 and 140,222.60 is: 210,288.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,780.68 : 631,034.70 = 140,222.60 : x
  2. Step 2: Convert to fraction form
    420,780.68/631,034.70 = 140,222.60/x
  3. Step 3: Cross multiply
    420,780.68x = 631,034.70 × 140,222.60
  4. Step 4: Simplify right side
    420,780.68x = 88,485,326,324.22
  5. Step 5: Solve for x
    x = 88,485,326,324.22/420,780.68
  6. Step 6: Final answer
    x = 210,288.47

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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.