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Finding the Fourth Proportional to 525,221.12, 725,408.64 and 382,618.88

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Solution

The fourth proportional to 525,221.12, 725,408.64 and 382,618.88 is: 528,453.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,221.12 : 725,408.64 = 382,618.88 : x
  2. Step 2: Convert to fraction form
    525,221.12/725,408.64 = 382,618.88/x
  3. Step 3: Cross multiply
    525,221.12x = 725,408.64 × 382,618.88
  4. Step 4: Simplify right side
    525,221.12x = 277,555,041,379.12
  5. Step 5: Solve for x
    x = 277,555,041,379.12/525,221.12
  6. Step 6: Final answer
    x = 528,453.69

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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.