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Finding the Fourth Proportional to 714,279.38, 985,674.51 and 391,994.87

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Solution

The fourth proportional to 714,279.38, 985,674.51 and 391,994.87 is: 540,935.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,279.38 : 985,674.51 = 391,994.87 : x
  2. Step 2: Convert to fraction form
    714,279.38/985,674.51 = 391,994.87/x
  3. Step 3: Cross multiply
    714,279.38x = 985,674.51 × 391,994.87
  4. Step 4: Simplify right side
    714,279.38x = 386,379,346,481.39
  5. Step 5: Solve for x
    x = 386,379,346,481.39/714,279.38
  6. Step 6: Final answer
    x = 540,935.89

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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.