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Finding the Fourth Proportional to 445,165.80, 667,748.70 and 279,277.80

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Solution

The fourth proportional to 445,165.80, 667,748.70 and 279,277.80 is: 418,916.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,165.80 : 667,748.70 = 279,277.80 : x
  2. Step 2: Convert to fraction form
    445,165.80/667,748.70 = 279,277.80/x
  3. Step 3: Cross multiply
    445,165.80x = 667,748.70 × 279,277.80
  4. Step 4: Simplify right side
    445,165.80x = 186,487,387,888.86
  5. Step 5: Solve for x
    x = 186,487,387,888.86/445,165.80
  6. Step 6: Final answer
    x = 418,916.70

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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.