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Finding the Fourth Proportional to 490,215.96, 676,393.09 and 286,174.28

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Solution

The fourth proportional to 490,215.96, 676,393.09 and 286,174.28 is: 394,859.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,215.96 : 676,393.09 = 286,174.28 : x
  2. Step 2: Convert to fraction form
    490,215.96/676,393.09 = 286,174.28/x
  3. Step 3: Cross multiply
    490,215.96x = 676,393.09 × 286,174.28
  4. Step 4: Simplify right side
    490,215.96x = 193,566,302,698.56
  5. Step 5: Solve for x
    x = 193,566,302,698.56/490,215.96
  6. Step 6: Final answer
    x = 394,859.24

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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.