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Finding the Fourth Proportional to 487,717.86, 673,076.80 and 272,845.11

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Solution

The fourth proportional to 487,717.86, 673,076.80 and 272,845.11 is: 376,540.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,717.86 : 673,076.80 = 272,845.11 : x
  2. Step 2: Convert to fraction form
    487,717.86/673,076.80 = 272,845.11/x
  3. Step 3: Cross multiply
    487,717.86x = 673,076.80 × 272,845.11
  4. Step 4: Simplify right side
    487,717.86x = 183,645,712,170.22
  5. Step 5: Solve for x
    x = 183,645,712,170.22/487,717.86
  6. Step 6: Final answer
    x = 376,540.88

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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.