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Finding the Fourth Proportional to 383,057.91, 528,380.42 and 275,457.51

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Solution

The fourth proportional to 383,057.91, 528,380.42 and 275,457.51 is: 379,959.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,057.91 : 528,380.42 = 275,457.51 : x
  2. Step 2: Convert to fraction form
    383,057.91/528,380.42 = 275,457.51/x
  3. Step 3: Cross multiply
    383,057.91x = 528,380.42 × 275,457.51
  4. Step 4: Simplify right side
    383,057.91x = 145,546,353,448.67
  5. Step 5: Solve for x
    x = 145,546,353,448.67/383,057.91
  6. Step 6: Final answer
    x = 379,959.14

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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.