Home / 815,470.56-1,222,665.84-389,072.16

Finding the Fourth Proportional to 815,470.56, 1,222,665.84 and 389,072.16

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Solution

The fourth proportional to 815,470.56, 1,222,665.84 and 389,072.16 is: 583,350.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,470.56 : 1,222,665.84 = 389,072.16 : x
  2. Step 2: Convert to fraction form
    815,470.56/1,222,665.84 = 389,072.16/x
  3. Step 3: Cross multiply
    815,470.56x = 1,222,665.84 × 389,072.16
  4. Step 4: Simplify right side
    815,470.56x = 475,705,239,327.01
  5. Step 5: Solve for x
    x = 475,705,239,327.01/815,470.56
  6. Step 6: Final answer
    x = 583,350.60

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1.5x scale

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.