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Finding the Fourth Proportional to 996,490.20, 1,391,937 and 996,490.20

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Solution

The fourth proportional to 996,490.20, 1,391,937 and 996,490.20 is: 1,391,937

Step by Step Solution

  1. Step 1: Write the proportion equation
    996,490.20 : 1,391,937 = 996,490.20 : x
  2. Step 2: Convert to fraction form
    996,490.20/1,391,937 = 996,490.20/x
  3. Step 3: Cross multiply
    996,490.20x = 1,391,937 × 996,490.20
  4. Step 4: Simplify right side
    996,490.20x = 1,387,051,579,517.40
  5. Step 5: Solve for x
    x = 1,387,051,579,517.40/996,490.20
  6. Step 6: Final answer
    x = 1,391,937

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.