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Finding the Fourth Proportional to 351,522.90, 485,110.48 and 215,631.78

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Solution

The fourth proportional to 351,522.90, 485,110.48 and 215,631.78 is: 297,577.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,522.90 : 485,110.48 = 215,631.78 : x
  2. Step 2: Convert to fraction form
    351,522.90/485,110.48 = 215,631.78/x
  3. Step 3: Cross multiply
    351,522.90x = 485,110.48 × 215,631.78
  4. Step 4: Simplify right side
    351,522.90x = 104,605,236,299.05
  5. Step 5: Solve for x
    x = 104,605,236,299.05/351,522.90
  6. Step 6: Final answer
    x = 297,577.30

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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.