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Finding the Fourth Proportional to 310,301.44, 428,221.67 and 172,493.30

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Solution

The fourth proportional to 310,301.44, 428,221.67 and 172,493.30 is: 238,043.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,301.44 : 428,221.67 = 172,493.30 : x
  2. Step 2: Convert to fraction form
    310,301.44/428,221.67 = 172,493.30/x
  3. Step 3: Cross multiply
    310,301.44x = 428,221.67 × 172,493.30
  4. Step 4: Simplify right side
    310,301.44x = 73,865,369,197.90
  5. Step 5: Solve for x
    x = 73,865,369,197.90/310,301.44
  6. Step 6: Final answer
    x = 238,043.92

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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.