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Finding the Fourth Proportional to 815,390.12, 1,222,779 and 282,782.72

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Solution

The fourth proportional to 815,390.12, 1,222,779 and 282,782.72 is: 424,067.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,390.12 : 1,222,779 = 282,782.72 : x
  2. Step 2: Convert to fraction form
    815,390.12/1,222,779 = 282,782.72/x
  3. Step 3: Cross multiply
    815,390.12x = 1,222,779 × 282,782.72
  4. Step 4: Simplify right side
    815,390.12x = 345,780,771,578.88
  5. Step 5: Solve for x
    x = 345,780,771,578.88/815,390.12
  6. Step 6: Final answer
    x = 424,067.89

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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.