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Finding the Fourth Proportional to 353,593.48, 488,139.78 and 272,839.72

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Solution

The fourth proportional to 353,593.48, 488,139.78 and 272,839.72 is: 376,658.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,593.48 : 488,139.78 = 272,839.72 : x
  2. Step 2: Convert to fraction form
    353,593.48/488,139.78 = 272,839.72/x
  3. Step 3: Cross multiply
    353,593.48x = 488,139.78 × 272,839.72
  4. Step 4: Simplify right side
    353,593.48x = 133,183,920,896.06
  5. Step 5: Solve for x
    x = 133,183,920,896.06/353,593.48
  6. Step 6: Final answer
    x = 376,658.31

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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.