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Finding the Fourth Proportional to 890,665.14, 1,229,195.64 and 488,334.90

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Solution

The fourth proportional to 890,665.14, 1,229,195.64 and 488,334.90 is: 673,944.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,665.14 : 1,229,195.64 = 488,334.90 : x
  2. Step 2: Convert to fraction form
    890,665.14/1,229,195.64 = 488,334.90/x
  3. Step 3: Cross multiply
    890,665.14x = 1,229,195.64 × 488,334.90
  4. Step 4: Simplify right side
    890,665.14x = 600,259,129,939.84
  5. Step 5: Solve for x
    x = 600,259,129,939.84/890,665.14
  6. Step 6: Final answer
    x = 673,944.79

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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.