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Finding the Fourth Proportional to 392,363.55, 587,708.60 and 189,653.36

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Solution

The fourth proportional to 392,363.55, 587,708.60 and 189,653.36 is: 284,075.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,363.55 : 587,708.60 = 189,653.36 : x
  2. Step 2: Convert to fraction form
    392,363.55/587,708.60 = 189,653.36/x
  3. Step 3: Cross multiply
    392,363.55x = 587,708.60 × 189,653.36
  4. Step 4: Simplify right side
    392,363.55x = 111,460,906,804.09
  5. Step 5: Solve for x
    x = 111,460,906,804.09/392,363.55
  6. Step 6: Final answer
    x = 284,075.59

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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.