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Finding the Fourth Proportional to 300,076.80, 449,510.40 and 187,411.20

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Solution

The fourth proportional to 300,076.80, 449,510.40 and 187,411.20 is: 280,739.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,076.80 : 449,510.40 = 187,411.20 : x
  2. Step 2: Convert to fraction form
    300,076.80/449,510.40 = 187,411.20/x
  3. Step 3: Cross multiply
    300,076.80x = 449,510.40 × 187,411.20
  4. Step 4: Simplify right side
    300,076.80x = 84,243,283,476.48
  5. Step 5: Solve for x
    x = 84,243,283,476.48/300,076.80
  6. Step 6: Final answer
    x = 280,739.08

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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.