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Finding the Fourth Proportional to 405,010.20, 606,859.20 and 345,961.20

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Solution

The fourth proportional to 405,010.20, 606,859.20 and 345,961.20 is: 518,381.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,010.20 : 606,859.20 = 345,961.20 : x
  2. Step 2: Convert to fraction form
    405,010.20/606,859.20 = 345,961.20/x
  3. Step 3: Cross multiply
    405,010.20x = 606,859.20 × 345,961.20
  4. Step 4: Simplify right side
    405,010.20x = 209,949,737,063.04
  5. Step 5: Solve for x
    x = 209,949,737,063.04/405,010.20
  6. Step 6: Final answer
    x = 518,381.36

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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.