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Finding the Fourth Proportional to 318,860.38, 440,058.37 and 238,147.76

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Solution

The fourth proportional to 318,860.38, 440,058.37 and 238,147.76 is: 328,667.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,860.38 : 440,058.37 = 238,147.76 : x
  2. Step 2: Convert to fraction form
    318,860.38/440,058.37 = 238,147.76/x
  3. Step 3: Cross multiply
    318,860.38x = 440,058.37 × 238,147.76
  4. Step 4: Simplify right side
    318,860.38x = 104,798,915,084.75
  5. Step 5: Solve for x
    x = 104,798,915,084.75/318,860.38
  6. Step 6: Final answer
    x = 328,667.10

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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.