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Finding the Fourth Proportional to 667,253.97, 920,876.33 and 380,816.91

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Solution

The fourth proportional to 667,253.97, 920,876.33 and 380,816.91 is: 525,564.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,253.97 : 920,876.33 = 380,816.91 : x
  2. Step 2: Convert to fraction form
    667,253.97/920,876.33 = 380,816.91/x
  3. Step 3: Cross multiply
    667,253.97x = 920,876.33 × 380,816.91
  4. Step 4: Simplify right side
    667,253.97x = 350,685,276,578.66
  5. Step 5: Solve for x
    x = 350,685,276,578.66/667,253.97
  6. Step 6: Final answer
    x = 525,564.92

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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.