Home / 815,421.85-1,222,592.89-389,023.48

Finding the Fourth Proportional to 815,421.85, 1,222,592.89 and 389,023.48

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Solution

The fourth proportional to 815,421.85, 1,222,592.89 and 389,023.48 is: 583,277.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,421.85 : 1,222,592.89 = 389,023.48 : x
  2. Step 2: Convert to fraction form
    815,421.85/1,222,592.89 = 389,023.48/x
  3. Step 3: Cross multiply
    815,421.85x = 1,222,592.89 × 389,023.48
  4. Step 4: Simplify right side
    815,421.85x = 475,617,340,204.78
  5. Step 5: Solve for x
    x = 475,617,340,204.78/815,421.85
  6. Step 6: Final answer
    x = 583,277.65

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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.