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Finding the Fourth Proportional to 309,884.84, 427,635.46 and 173,908.12

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Solution

The fourth proportional to 309,884.84, 427,635.46 and 173,908.12 is: 239,990.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,884.84 : 427,635.46 = 173,908.12 : x
  2. Step 2: Convert to fraction form
    309,884.84/427,635.46 = 173,908.12/x
  3. Step 3: Cross multiply
    309,884.84x = 427,635.46 × 173,908.12
  4. Step 4: Simplify right side
    309,884.84x = 74,369,278,893.94
  5. Step 5: Solve for x
    x = 74,369,278,893.94/309,884.84
  6. Step 6: Final answer
    x = 239,990.05

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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.