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Finding the Fourth Proportional to 398,740.32, 550,253.52 and 219,892.32

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Solution

The fourth proportional to 398,740.32, 550,253.52 and 219,892.32 is: 303,446.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,740.32 : 550,253.52 = 219,892.32 : x
  2. Step 2: Convert to fraction form
    398,740.32/550,253.52 = 219,892.32/x
  3. Step 3: Cross multiply
    398,740.32x = 550,253.52 × 219,892.32
  4. Step 4: Simplify right side
    398,740.32x = 120,996,523,100.97
  5. Step 5: Solve for x
    x = 120,996,523,100.97/398,740.32
  6. Step 6: Final answer
    x = 303,446.92

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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.