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Finding the Fourth Proportional to 351,507.43, 485,128.53 and 215,517.34

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Solution

The fourth proportional to 351,507.43, 485,128.53 and 215,517.34 is: 297,443.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,507.43 : 485,128.53 = 215,517.34 : x
  2. Step 2: Convert to fraction form
    351,507.43/485,128.53 = 215,517.34/x
  3. Step 3: Cross multiply
    351,507.43x = 485,128.53 × 215,517.34
  4. Step 4: Simplify right side
    351,507.43x = 104,553,610,343.71
  5. Step 5: Solve for x
    x = 104,553,610,343.71/351,507.43
  6. Step 6: Final answer
    x = 297,443.53

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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.