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Finding the Fourth Proportional to 318,412.49, 439,412.09 and 173,221.43

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Solution

The fourth proportional to 318,412.49, 439,412.09 and 173,221.43 is: 239,047.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,412.49 : 439,412.09 = 173,221.43 : x
  2. Step 2: Convert to fraction form
    318,412.49/439,412.09 = 173,221.43/x
  3. Step 3: Cross multiply
    318,412.49x = 439,412.09 × 173,221.43
  4. Step 4: Simplify right side
    318,412.49x = 76,115,590,589.09
  5. Step 5: Solve for x
    x = 76,115,590,589.09/318,412.49
  6. Step 6: Final answer
    x = 239,047.13

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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.