Home / 509,255.79-702,834.09-305,418.85

Finding the Fourth Proportional to 509,255.79, 702,834.09 and 305,418.85

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Solution

The fourth proportional to 509,255.79, 702,834.09 and 305,418.85 is: 421,514.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,255.79 : 702,834.09 = 305,418.85 : x
  2. Step 2: Convert to fraction form
    509,255.79/702,834.09 = 305,418.85/x
  3. Step 3: Cross multiply
    509,255.79x = 702,834.09 × 305,418.85
  4. Step 4: Simplify right side
    509,255.79x = 214,658,778,745.05
  5. Step 5: Solve for x
    x = 214,658,778,745.05/509,255.79
  6. Step 6: Final answer
    x = 421,514.66

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1.5x scale

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.