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Finding the Fourth Proportional to 394,525.80, 591,788.70 and 378,779.40

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Solution

The fourth proportional to 394,525.80, 591,788.70 and 378,779.40 is: 568,169.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,525.80 : 591,788.70 = 378,779.40 : x
  2. Step 2: Convert to fraction form
    394,525.80/591,788.70 = 378,779.40/x
  3. Step 3: Cross multiply
    394,525.80x = 591,788.70 × 378,779.40
  4. Step 4: Simplify right side
    394,525.80x = 224,157,368,712.78
  5. Step 5: Solve for x
    x = 224,157,368,712.78/394,525.80
  6. Step 6: Final answer
    x = 568,169.10

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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.