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Finding the Fourth Proportional to 397,420.64, 548,162.88 and 269,874.80

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Solution

The fourth proportional to 397,420.64, 548,162.88 and 269,874.80 is: 372,238.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,420.64 : 548,162.88 = 269,874.80 : x
  2. Step 2: Convert to fraction form
    397,420.64/548,162.88 = 269,874.80/x
  3. Step 3: Cross multiply
    397,420.64x = 548,162.88 × 269,874.80
  4. Step 4: Simplify right side
    397,420.64x = 147,935,347,607.42
  5. Step 5: Solve for x
    x = 147,935,347,607.42/397,420.64
  6. Step 6: Final answer
    x = 372,238.71

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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.