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Finding the Fourth Proportional to 621,609.64, 857,796.42 and 349,682.92

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Solution

The fourth proportional to 621,609.64, 857,796.42 and 349,682.92 is: 482,548.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,609.64 : 857,796.42 = 349,682.92 : x
  2. Step 2: Convert to fraction form
    621,609.64/857,796.42 = 349,682.92/x
  3. Step 3: Cross multiply
    621,609.64x = 857,796.42 × 349,682.92
  4. Step 4: Simplify right side
    621,609.64x = 299,956,756,911.15
  5. Step 5: Solve for x
    x = 299,956,756,911.15/621,609.64
  6. Step 6: Final answer
    x = 482,548.43

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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.