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Finding the Fourth Proportional to 318,860.50, 440,058.54 and 238,147.88

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Solution

The fourth proportional to 318,860.50, 440,058.54 and 238,147.88 is: 328,667.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,860.50 : 440,058.54 = 238,147.88 : x
  2. Step 2: Convert to fraction form
    318,860.50/440,058.54 = 238,147.88/x
  3. Step 3: Cross multiply
    318,860.50x = 440,058.54 × 238,147.88
  4. Step 4: Simplify right side
    318,860.50x = 104,799,008,376.90
  5. Step 5: Solve for x
    x = 104,799,008,376.90/318,860.50
  6. Step 6: Final answer
    x = 328,667.26

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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.