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Finding the Fourth Proportional to 483,793.23, 721,608.15 and 420,112.65

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Solution

The fourth proportional to 483,793.23, 721,608.15 and 420,112.65 is: 626,624.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,793.23 : 721,608.15 = 420,112.65 : x
  2. Step 2: Convert to fraction form
    483,793.23/721,608.15 = 420,112.65/x
  3. Step 3: Cross multiply
    483,793.23x = 721,608.15 × 420,112.65
  4. Step 4: Simplify right side
    483,793.23x = 303,156,712,158.10
  5. Step 5: Solve for x
    x = 303,156,712,158.10/483,793.23
  6. Step 6: Final answer
    x = 626,624.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.