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Finding the Fourth Proportional to 714,198.03, 985,592.70 and 391,928.40

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Solution

The fourth proportional to 714,198.03, 985,592.70 and 391,928.40 is: 540,860.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,198.03 : 985,592.70 = 391,928.40 : x
  2. Step 2: Convert to fraction form
    714,198.03/985,592.70 = 391,928.40/x
  3. Step 3: Cross multiply
    714,198.03x = 985,592.70 × 391,928.40
  4. Step 4: Simplify right side
    714,198.03x = 386,281,769,962.68
  5. Step 5: Solve for x
    x = 386,281,769,962.68/714,198.03
  6. Step 6: Final answer
    x = 540,860.87

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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.