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Finding the Fourth Proportional to 382,765.43, 528,212.12 and 210,679.72

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Solution

The fourth proportional to 382,765.43, 528,212.12 and 210,679.72 is: 290,735.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,765.43 : 528,212.12 = 210,679.72 : x
  2. Step 2: Convert to fraction form
    382,765.43/528,212.12 = 210,679.72/x
  3. Step 3: Cross multiply
    382,765.43x = 528,212.12 × 210,679.72
  4. Step 4: Simplify right side
    382,765.43x = 111,283,579,168.28
  5. Step 5: Solve for x
    x = 111,283,579,168.28/382,765.43
  6. Step 6: Final answer
    x = 290,735.71

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1.5x scale

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.