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Finding the Fourth Proportional to 688,504.34, 950,157.42 and 378,401.34

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Solution

The fourth proportional to 688,504.34, 950,157.42 and 378,401.34 is: 522,205.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,504.34 : 950,157.42 = 378,401.34 : x
  2. Step 2: Convert to fraction form
    688,504.34/950,157.42 = 378,401.34/x
  3. Step 3: Cross multiply
    688,504.34x = 950,157.42 × 378,401.34
  4. Step 4: Simplify right side
    688,504.34x = 359,540,840,938.94
  5. Step 5: Solve for x
    x = 359,540,840,938.94/688,504.34
  6. Step 6: Final answer
    x = 522,205.63

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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.