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Finding the Fourth Proportional to 310,555.01, 428,581.32 and 189,676.73

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Solution

The fourth proportional to 310,555.01, 428,581.32 and 189,676.73 is: 261,763.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,555.01 : 428,581.32 = 189,676.73 : x
  2. Step 2: Convert to fraction form
    310,555.01/428,581.32 = 189,676.73/x
  3. Step 3: Cross multiply
    310,555.01x = 428,581.32 × 189,676.73
  4. Step 4: Simplify right side
    310,555.01x = 81,291,903,316.68
  5. Step 5: Solve for x
    x = 81,291,903,316.68/310,555.01
  6. Step 6: Final answer
    x = 261,763.30

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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.