Home / 819,865.95-1,230,172.60-420,786.98

Finding the Fourth Proportional to 819,865.95, 1,230,172.60 and 420,786.98

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Solution

The fourth proportional to 819,865.95, 1,230,172.60 and 420,786.98 is: 631,372.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,865.95 : 1,230,172.60 = 420,786.98 : x
  2. Step 2: Convert to fraction form
    819,865.95/1,230,172.60 = 420,786.98/x
  3. Step 3: Cross multiply
    819,865.95x = 1,230,172.60 × 420,786.98
  4. Step 4: Simplify right side
    819,865.95x = 517,640,613,232.75
  5. Step 5: Solve for x
    x = 517,640,613,232.75/819,865.95
  6. Step 6: Final answer
    x = 631,372.25

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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.