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Finding the Fourth Proportional to 861,745.52, 1,293,208.68 and 300,779.84

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Solution

The fourth proportional to 861,745.52, 1,293,208.68 and 300,779.84 is: 451,375.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,745.52 : 1,293,208.68 = 300,779.84 : x
  2. Step 2: Convert to fraction form
    861,745.52/1,293,208.68 = 300,779.84/x
  3. Step 3: Cross multiply
    861,745.52x = 1,293,208.68 × 300,779.84
  4. Step 4: Simplify right side
    861,745.52x = 388,971,099,857.01
  5. Step 5: Solve for x
    x = 388,971,099,857.01/861,745.52
  6. Step 6: Final answer
    x = 451,375.83

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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.