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Finding the Fourth Proportional to 272,963.84, 376,771.20 and 172,428.80

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Solution

The fourth proportional to 272,963.84, 376,771.20 and 172,428.80 is: 238,002.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,963.84 : 376,771.20 = 172,428.80 : x
  2. Step 2: Convert to fraction form
    272,963.84/376,771.20 = 172,428.80/x
  3. Step 3: Cross multiply
    272,963.84x = 376,771.20 × 172,428.80
  4. Step 4: Simplify right side
    272,963.84x = 64,966,205,890.56
  5. Step 5: Solve for x
    x = 64,966,205,890.56/272,963.84
  6. Step 6: Final answer
    x = 238,002.97

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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.