Home / 378,983.32-522,983.24-209,213.80

Finding the Fourth Proportional to 378,983.32, 522,983.24 and 209,213.80

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Solution

The fourth proportional to 378,983.32, 522,983.24 and 209,213.80 is: 288,707.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,983.32 : 522,983.24 = 209,213.80 : x
  2. Step 2: Convert to fraction form
    378,983.32/522,983.24 = 209,213.80/x
  3. Step 3: Cross multiply
    378,983.32x = 522,983.24 × 209,213.80
  4. Step 4: Simplify right side
    378,983.32x = 109,415,310,976.71
  5. Step 5: Solve for x
    x = 109,415,310,976.71/378,983.32
  6. Step 6: Final answer
    x = 288,707.46

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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.