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Finding the Fourth Proportional to 525,879.12, 725,770.86 and 305,165.04

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Solution

The fourth proportional to 525,879.12, 725,770.86 and 305,165.04 is: 421,161.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,879.12 : 725,770.86 = 305,165.04 : x
  2. Step 2: Convert to fraction form
    525,879.12/725,770.86 = 305,165.04/x
  3. Step 3: Cross multiply
    525,879.12x = 725,770.86 × 305,165.04
  4. Step 4: Simplify right side
    525,879.12x = 221,479,893,522.73
  5. Step 5: Solve for x
    x = 221,479,893,522.73/525,879.12
  6. Step 6: Final answer
    x = 421,161.22

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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.