Home / 679,939.20-938,317.04-378,133.20

Finding the Fourth Proportional to 679,939.20, 938,317.04 and 378,133.20

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Solution

The fourth proportional to 679,939.20, 938,317.04 and 378,133.20 is: 521,824.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,939.20 : 938,317.04 = 378,133.20 : x
  2. Step 2: Convert to fraction form
    679,939.20/938,317.04 = 378,133.20/x
  3. Step 3: Cross multiply
    679,939.20x = 938,317.04 × 378,133.20
  4. Step 4: Simplify right side
    679,939.20x = 354,808,824,949.73
  5. Step 5: Solve for x
    x = 354,808,824,949.73/679,939.20
  6. Step 6: Final answer
    x = 521,824.34

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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.