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Finding the Fourth Proportional to 496,945.80, 745,515.90 and 212,635.80

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Solution

The fourth proportional to 496,945.80, 745,515.90 and 212,635.80 is: 318,995.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,945.80 : 745,515.90 = 212,635.80 : x
  2. Step 2: Convert to fraction form
    496,945.80/745,515.90 = 212,635.80/x
  3. Step 3: Cross multiply
    496,945.80x = 745,515.90 × 212,635.80
  4. Step 4: Simplify right side
    496,945.80x = 158,523,369,809.22
  5. Step 5: Solve for x
    x = 158,523,369,809.22/496,945.80
  6. Step 6: Final answer
    x = 318,995.29

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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.