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Finding the Fourth Proportional to 572,755, 790,401.92 and 318,129.88

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Solution

The fourth proportional to 572,755, 790,401.92 and 318,129.88 is: 439,019.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,755 : 790,401.92 = 318,129.88 : x
  2. Step 2: Convert to fraction form
    572,755/790,401.92 = 318,129.88/x
  3. Step 3: Cross multiply
    572,755x = 790,401.92 × 318,129.88
  4. Step 4: Simplify right side
    572,755x = 251,450,467,961.37
  5. Step 5: Solve for x
    x = 251,450,467,961.37/572,755
  6. Step 6: Final answer
    x = 439,019.25

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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.