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Finding the Fourth Proportional to 642,195, 886,229.48 and 351,817.12

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Solution

The fourth proportional to 642,195, 886,229.48 and 351,817.12 is: 485,507.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,195 : 886,229.48 = 351,817.12 : x
  2. Step 2: Convert to fraction form
    642,195/886,229.48 = 351,817.12/x
  3. Step 3: Cross multiply
    642,195x = 886,229.48 × 351,817.12
  4. Step 4: Simplify right side
    642,195x = 311,790,705,300.03
  5. Step 5: Solve for x
    x = 311,790,705,300.03/642,195
  6. Step 6: Final answer
    x = 485,507.84

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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.