Home / 665,180.11-917,949.41-378,700.19

Finding the Fourth Proportional to 665,180.11, 917,949.41 and 378,700.19

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Solution

The fourth proportional to 665,180.11, 917,949.41 and 378,700.19 is: 522,606.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,180.11 : 917,949.41 = 378,700.19 : x
  2. Step 2: Convert to fraction form
    665,180.11/917,949.41 = 378,700.19/x
  3. Step 3: Cross multiply
    665,180.11x = 917,949.41 × 378,700.19
  4. Step 4: Simplify right side
    665,180.11x = 347,627,615,977.39
  5. Step 5: Solve for x
    x = 347,627,615,977.39/665,180.11
  6. Step 6: Final answer
    x = 522,606.75

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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.