Home / 815,426.68-1,222,600.12-389,028.31

Finding the Fourth Proportional to 815,426.68, 1,222,600.12 and 389,028.31

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Solution

The fourth proportional to 815,426.68, 1,222,600.12 and 389,028.31 is: 583,284.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,426.68 : 1,222,600.12 = 389,028.31 : x
  2. Step 2: Convert to fraction form
    815,426.68/1,222,600.12 = 389,028.31/x
  3. Step 3: Cross multiply
    815,426.68x = 1,222,600.12 × 389,028.31
  4. Step 4: Simplify right side
    815,426.68x = 475,626,058,489.40
  5. Step 5: Solve for x
    x = 475,626,058,489.40/815,426.68
  6. Step 6: Final answer
    x = 583,284.89

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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.