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Finding the Fourth Proportional to 677,702.70, 935,193.60 and 391,205.70

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Solution

The fourth proportional to 677,702.70, 935,193.60 and 391,205.70 is: 539,843.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,702.70 : 935,193.60 = 391,205.70 : x
  2. Step 2: Convert to fraction form
    677,702.70/935,193.60 = 391,205.70/x
  3. Step 3: Cross multiply
    677,702.70x = 935,193.60 × 391,205.70
  4. Step 4: Simplify right side
    677,702.70x = 365,853,066,923.52
  5. Step 5: Solve for x
    x = 365,853,066,923.52/677,702.70
  6. Step 6: Final answer
    x = 539,843.01

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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.