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Finding the Fourth Proportional to 457,231.20, 685,846.80 and 124,807.20

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Solution

The fourth proportional to 457,231.20, 685,846.80 and 124,807.20 is: 187,210.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,231.20 : 685,846.80 = 124,807.20 : x
  2. Step 2: Convert to fraction form
    457,231.20/685,846.80 = 124,807.20/x
  3. Step 3: Cross multiply
    457,231.20x = 685,846.80 × 124,807.20
  4. Step 4: Simplify right side
    457,231.20x = 85,598,618,736.96
  5. Step 5: Solve for x
    x = 85,598,618,736.96/457,231.20
  6. Step 6: Final answer
    x = 187,210.80

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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.