Home / 391,289.35-542,741.90-380,918.87

Finding the Fourth Proportional to 391,289.35, 542,741.90 and 380,918.87

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Solution

The fourth proportional to 391,289.35, 542,741.90 and 380,918.87 is: 528,357.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,289.35 : 542,741.90 = 380,918.87 : x
  2. Step 2: Convert to fraction form
    391,289.35/542,741.90 = 380,918.87/x
  3. Step 3: Cross multiply
    391,289.35x = 542,741.90 × 380,918.87
  4. Step 4: Simplify right side
    391,289.35x = 206,740,631,249.65
  5. Step 5: Solve for x
    x = 206,740,631,249.65/391,289.35
  6. Step 6: Final answer
    x = 528,357.42

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.