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Finding the Fourth Proportional to 724,322.40, 1,086,872.40 and 303,640.80

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Solution

The fourth proportional to 724,322.40, 1,086,872.40 and 303,640.80 is: 455,624.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,322.40 : 1,086,872.40 = 303,640.80 : x
  2. Step 2: Convert to fraction form
    724,322.40/1,086,872.40 = 303,640.80/x
  3. Step 3: Cross multiply
    724,322.40x = 1,086,872.40 × 303,640.80
  4. Step 4: Simplify right side
    724,322.40x = 330,018,805,033.92
  5. Step 5: Solve for x
    x = 330,018,805,033.92/724,322.40
  6. Step 6: Final answer
    x = 455,624.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.