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Finding the Fourth Proportional to 890,676.75, 1,229,133.92 and 488,268.75

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Solution

The fourth proportional to 890,676.75, 1,229,133.92 and 488,268.75 is: 673,810.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,676.75 : 1,229,133.92 = 488,268.75 : x
  2. Step 2: Convert to fraction form
    890,676.75/1,229,133.92 = 488,268.75/x
  3. Step 3: Cross multiply
    890,676.75x = 1,229,133.92 × 488,268.75
  4. Step 4: Simplify right side
    890,676.75x = 600,147,680,259.66
  5. Step 5: Solve for x
    x = 600,147,680,259.66/890,676.75
  6. Step 6: Final answer
    x = 673,810.88

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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.