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Finding the Fourth Proportional to 641,997.84, 885,956.22 and 355,517.58

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Solution

The fourth proportional to 641,997.84, 885,956.22 and 355,517.58 is: 490,613.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,997.84 : 885,956.22 = 355,517.58 : x
  2. Step 2: Convert to fraction form
    641,997.84/885,956.22 = 355,517.58/x
  3. Step 3: Cross multiply
    641,997.84x = 885,956.22 × 355,517.58
  4. Step 4: Simplify right side
    641,997.84x = 314,973,011,320.35
  5. Step 5: Solve for x
    x = 314,973,011,320.35/641,997.84
  6. Step 6: Final answer
    x = 490,613.82

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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.