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Finding the Fourth Proportional to 425,999.40, 638,456.40 and 226,415.40

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Solution

The fourth proportional to 425,999.40, 638,456.40 and 226,415.40 is: 339,334.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,999.40 : 638,456.40 = 226,415.40 : x
  2. Step 2: Convert to fraction form
    425,999.40/638,456.40 = 226,415.40/x
  3. Step 3: Cross multiply
    425,999.40x = 638,456.40 × 226,415.40
  4. Step 4: Simplify right side
    425,999.40x = 144,556,361,188.56
  5. Step 5: Solve for x
    x = 144,556,361,188.56/425,999.40
  6. Step 6: Final answer
    x = 339,334.66

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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.