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Finding the Fourth Proportional to 558,285.43, 770,431.74 and 303,640.87

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Solution

The fourth proportional to 558,285.43, 770,431.74 and 303,640.87 is: 419,023.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,285.43 : 770,431.74 = 303,640.87 : x
  2. Step 2: Convert to fraction form
    558,285.43/770,431.74 = 303,640.87/x
  3. Step 3: Cross multiply
    558,285.43x = 770,431.74 × 303,640.87
  4. Step 4: Simplify right side
    558,285.43x = 233,934,563,809.21
  5. Step 5: Solve for x
    x = 233,934,563,809.21/558,285.43
  6. Step 6: Final answer
    x = 419,023.23

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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.