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Finding the Fourth Proportional to 496,739.80, 745,109.70 and 445,418.20

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Solution

The fourth proportional to 496,739.80, 745,109.70 and 445,418.20 is: 668,127.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,739.80 : 745,109.70 = 445,418.20 : x
  2. Step 2: Convert to fraction form
    496,739.80/745,109.70 = 445,418.20/x
  3. Step 3: Cross multiply
    496,739.80x = 745,109.70 × 445,418.20
  4. Step 4: Simplify right side
    496,739.80x = 331,885,421,376.54
  5. Step 5: Solve for x
    x = 331,885,421,376.54/496,739.80
  6. Step 6: Final answer
    x = 668,127.30

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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.