Home / 699,043.90-964,671.36-393,120.20

Finding the Fourth Proportional to 699,043.90, 964,671.36 and 393,120.20

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Solution

The fourth proportional to 699,043.90, 964,671.36 and 393,120.20 is: 542,500.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,043.90 : 964,671.36 = 393,120.20 : x
  2. Step 2: Convert to fraction form
    699,043.90/964,671.36 = 393,120.20/x
  3. Step 3: Cross multiply
    699,043.90x = 964,671.36 × 393,120.20
  4. Step 4: Simplify right side
    699,043.90x = 379,231,797,977.47
  5. Step 5: Solve for x
    x = 379,231,797,977.47/699,043.90
  6. Step 6: Final answer
    x = 542,500.69

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Double scale
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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.