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Finding the Fourth Proportional to 391,204.80, 539,088.48 and 277,709.76

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Solution

The fourth proportional to 391,204.80, 539,088.48 and 277,709.76 is: 382,689.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,204.80 : 539,088.48 = 277,709.76 : x
  2. Step 2: Convert to fraction form
    391,204.80/539,088.48 = 277,709.76/x
  3. Step 3: Cross multiply
    391,204.80x = 539,088.48 × 277,709.76
  4. Step 4: Simplify right side
    391,204.80x = 149,710,132,399.57
  5. Step 5: Solve for x
    x = 149,710,132,399.57/391,204.80
  6. Step 6: Final answer
    x = 382,689.92

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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.