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Finding the Fourth Proportional to 409,339.85, 611,131.61 and 312,771.66

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Solution

The fourth proportional to 409,339.85, 611,131.61 and 312,771.66 is: 466,958.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,339.85 : 611,131.61 = 312,771.66 : x
  2. Step 2: Convert to fraction form
    409,339.85/611,131.61 = 312,771.66/x
  3. Step 3: Cross multiply
    409,339.85x = 611,131.61 × 312,771.66
  4. Step 4: Simplify right side
    409,339.85x = 191,144,650,465.28
  5. Step 5: Solve for x
    x = 191,144,650,465.28/409,339.85
  6. Step 6: Final answer
    x = 466,958.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.