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Finding the Fourth Proportional to 691,489.15, 954,318 and 419,626.22

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Solution

The fourth proportional to 691,489.15, 954,318 and 419,626.22 is: 579,122.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,489.15 : 954,318 = 419,626.22 : x
  2. Step 2: Convert to fraction form
    691,489.15/954,318 = 419,626.22/x
  3. Step 3: Cross multiply
    691,489.15x = 954,318 × 419,626.22
  4. Step 4: Simplify right side
    691,489.15x = 400,456,855,017.96
  5. Step 5: Solve for x
    x = 400,456,855,017.96/691,489.15
  6. Step 6: Final answer
    x = 579,122.40

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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.