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Finding the Fourth Proportional to 318,397.80, 439,379.76 and 173,199

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Solution

The fourth proportional to 318,397.80, 439,379.76 and 173,199 is: 239,009.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,397.80 : 439,379.76 = 173,199 : x
  2. Step 2: Convert to fraction form
    318,397.80/439,379.76 = 173,199/x
  3. Step 3: Cross multiply
    318,397.80x = 439,379.76 × 173,199
  4. Step 4: Simplify right side
    318,397.80x = 76,100,135,052.24
  5. Step 5: Solve for x
    x = 76,100,135,052.24/318,397.80
  6. Step 6: Final answer
    x = 239,009.61

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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.