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Finding the Fourth Proportional to 318,859.88, 440,057.68 and 238,147.26

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Solution

The fourth proportional to 318,859.88, 440,057.68 and 238,147.26 is: 328,666.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,859.88 : 440,057.68 = 238,147.26 : x
  2. Step 2: Convert to fraction form
    318,859.88/440,057.68 = 238,147.26/x
  3. Step 3: Cross multiply
    318,859.88x = 440,057.68 × 238,147.26
  4. Step 4: Simplify right side
    318,859.88x = 104,798,527,342.93
  5. Step 5: Solve for x
    x = 104,798,527,342.93/318,859.88
  6. Step 6: Final answer
    x = 328,666.40

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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.