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Finding the Fourth Proportional to 496,721.80, 745,082.70 and 445,400.20

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Solution

The fourth proportional to 496,721.80, 745,082.70 and 445,400.20 is: 668,100.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,721.80 : 745,082.70 = 445,400.20 : x
  2. Step 2: Convert to fraction form
    496,721.80/745,082.70 = 445,400.20/x
  3. Step 3: Cross multiply
    496,721.80x = 745,082.70 × 445,400.20
  4. Step 4: Simplify right side
    496,721.80x = 331,859,983,596.54
  5. Step 5: Solve for x
    x = 331,859,983,596.54/496,721.80
  6. Step 6: Final answer
    x = 668,100.30

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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.