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Finding the Fourth Proportional to 621,120.76, 857,039.64 and 349,150.96

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Solution

The fourth proportional to 621,120.76, 857,039.64 and 349,150.96 is: 481,768.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,120.76 : 857,039.64 = 349,150.96 : x
  2. Step 2: Convert to fraction form
    621,120.76/857,039.64 = 349,150.96/x
  3. Step 3: Cross multiply
    621,120.76x = 857,039.64 × 349,150.96
  4. Step 4: Simplify right side
    621,120.76x = 299,236,213,064.05
  5. Step 5: Solve for x
    x = 299,236,213,064.05/621,120.76
  6. Step 6: Final answer
    x = 481,768.17

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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.