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Finding the Fourth Proportional to 352,608.93, 528,909.75 and 86,370.84

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Solution

The fourth proportional to 352,608.93, 528,909.75 and 86,370.84 is: 129,555.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,608.93 : 528,909.75 = 86,370.84 : x
  2. Step 2: Convert to fraction form
    352,608.93/528,909.75 = 86,370.84/x
  3. Step 3: Cross multiply
    352,608.93x = 528,909.75 × 86,370.84
  4. Step 4: Simplify right side
    352,608.93x = 45,682,379,391.69
  5. Step 5: Solve for x
    x = 45,682,379,391.69/352,608.93
  6. Step 6: Final answer
    x = 129,555.37

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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.