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Finding the Fourth Proportional to 722,003.12, 996,324.80 and 431,620.56

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Solution

The fourth proportional to 722,003.12, 996,324.80 and 431,620.56 is: 595,612.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,003.12 : 996,324.80 = 431,620.56 : x
  2. Step 2: Convert to fraction form
    722,003.12/996,324.80 = 431,620.56/x
  3. Step 3: Cross multiply
    722,003.12x = 996,324.80 × 431,620.56
  4. Step 4: Simplify right side
    722,003.12x = 430,034,268,117.89
  5. Step 5: Solve for x
    x = 430,034,268,117.89/722,003.12
  6. Step 6: Final answer
    x = 595,612.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.