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Finding the Fourth Proportional to 391,203.80, 539,087.10 and 277,708.76

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Solution

The fourth proportional to 391,203.80, 539,087.10 and 277,708.76 is: 382,688.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,203.80 : 539,087.10 = 277,708.76 : x
  2. Step 2: Convert to fraction form
    391,203.80/539,087.10 = 277,708.76/x
  3. Step 3: Cross multiply
    391,203.80x = 539,087.10 × 277,708.76
  4. Step 4: Simplify right side
    391,203.80x = 149,709,210,073.00
  5. Step 5: Solve for x
    x = 149,709,210,073.00/391,203.80
  6. Step 6: Final answer
    x = 382,688.54

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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.