Home / 680,453.10-938,964.29-393,992.55

Finding the Fourth Proportional to 680,453.10, 938,964.29 and 393,992.55

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Solution

The fourth proportional to 680,453.10, 938,964.29 and 393,992.55 is: 543,674.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,453.10 : 938,964.29 = 393,992.55 : x
  2. Step 2: Convert to fraction form
    680,453.10/938,964.29 = 393,992.55/x
  3. Step 3: Cross multiply
    680,453.10x = 938,964.29 × 393,992.55
  4. Step 4: Simplify right side
    680,453.10x = 369,944,933,006.08
  5. Step 5: Solve for x
    x = 369,944,933,006.08/680,453.10
  6. Step 6: Final answer
    x = 543,674.40

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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.