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Finding the Fourth Proportional to 313,238.90, 432,207.15 and 190,649.17

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Solution

The fourth proportional to 313,238.90, 432,207.15 and 190,649.17 is: 263,057.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,238.90 : 432,207.15 = 190,649.17 : x
  2. Step 2: Convert to fraction form
    313,238.90/432,207.15 = 190,649.17/x
  3. Step 3: Cross multiply
    313,238.90x = 432,207.15 × 190,649.17
  4. Step 4: Simplify right side
    313,238.90x = 82,399,934,415.57
  5. Step 5: Solve for x
    x = 82,399,934,415.57/313,238.90
  6. Step 6: Final answer
    x = 263,057.80

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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.