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Finding the Fourth Proportional to 310,467.48, 428,440.02 and 172,640.92

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Solution

The fourth proportional to 310,467.48, 428,440.02 and 172,640.92 is: 238,241.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,467.48 : 428,440.02 = 172,640.92 : x
  2. Step 2: Convert to fraction form
    310,467.48/428,440.02 = 172,640.92/x
  3. Step 3: Cross multiply
    310,467.48x = 428,440.02 × 172,640.92
  4. Step 4: Simplify right side
    310,467.48x = 73,966,279,217.62
  5. Step 5: Solve for x
    x = 73,966,279,217.62/310,467.48
  6. Step 6: Final answer
    x = 238,241.63

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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.