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Finding the Fourth Proportional to 308,846.40, 426,187.35 and 172,857.12

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Solution

The fourth proportional to 308,846.40, 426,187.35 and 172,857.12 is: 238,531.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,846.40 : 426,187.35 = 172,857.12 : x
  2. Step 2: Convert to fraction form
    308,846.40/426,187.35 = 172,857.12/x
  3. Step 3: Cross multiply
    308,846.40x = 426,187.35 × 172,857.12
  4. Step 4: Simplify right side
    308,846.40x = 73,669,517,901.43
  5. Step 5: Solve for x
    x = 73,669,517,901.43/308,846.40
  6. Step 6: Final answer
    x = 238,531.25

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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.