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Finding the Fourth Proportional to 404,486.56, 558,191.36 and 225,638.56

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Solution

The fourth proportional to 404,486.56, 558,191.36 and 225,638.56 is: 311,381.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,486.56 : 558,191.36 = 225,638.56 : x
  2. Step 2: Convert to fraction form
    404,486.56/558,191.36 = 225,638.56/x
  3. Step 3: Cross multiply
    404,486.56x = 558,191.36 × 225,638.56
  4. Step 4: Simplify right side
    404,486.56x = 125,949,494,674.84
  5. Step 5: Solve for x
    x = 125,949,494,674.84/404,486.56
  6. Step 6: Final answer
    x = 311,381.16

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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.