Home / 385,169.78-531,531.21-215,403.91

Finding the Fourth Proportional to 385,169.78, 531,531.21 and 215,403.91

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Solution

The fourth proportional to 385,169.78, 531,531.21 and 215,403.91 is: 297,255.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,169.78 : 531,531.21 = 215,403.91 : x
  2. Step 2: Convert to fraction form
    385,169.78/531,531.21 = 215,403.91/x
  3. Step 3: Cross multiply
    385,169.78x = 531,531.21 × 215,403.91
  4. Step 4: Simplify right side
    385,169.78x = 114,493,900,399.97
  5. Step 5: Solve for x
    x = 114,493,900,399.97/385,169.78
  6. Step 6: Final answer
    x = 297,255.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.