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Finding the Fourth Proportional to 688,965.52, 950,687.40 and 398,626.96

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Solution

The fourth proportional to 688,965.52, 950,687.40 and 398,626.96 is: 550,056.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,965.52 : 950,687.40 = 398,626.96 : x
  2. Step 2: Convert to fraction form
    688,965.52/950,687.40 = 398,626.96/x
  3. Step 3: Cross multiply
    688,965.52x = 950,687.40 × 398,626.96
  4. Step 4: Simplify right side
    688,965.52x = 378,969,628,172.30
  5. Step 5: Solve for x
    x = 378,969,628,172.30/688,965.52
  6. Step 6: Final answer
    x = 550,056.01

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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.