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Finding the Fourth Proportional to 318,675.85, 439,716.75 and 191,354.18

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Solution

The fourth proportional to 318,675.85, 439,716.75 and 191,354.18 is: 264,035.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,675.85 : 439,716.75 = 191,354.18 : x
  2. Step 2: Convert to fraction form
    318,675.85/439,716.75 = 191,354.18/x
  3. Step 3: Cross multiply
    318,675.85x = 439,716.75 × 191,354.18
  4. Step 4: Simplify right side
    318,675.85x = 84,141,636,861.29
  5. Step 5: Solve for x
    x = 84,141,636,861.29/318,675.85
  6. Step 6: Final answer
    x = 264,035.18

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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.