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Finding the Fourth Proportional to 308,770.22, 426,121.69 and 172,801.40

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Solution

The fourth proportional to 308,770.22, 426,121.69 and 172,801.40 is: 238,476.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,770.22 : 426,121.69 = 172,801.40 : x
  2. Step 2: Convert to fraction form
    308,770.22/426,121.69 = 172,801.40/x
  3. Step 3: Cross multiply
    308,770.22x = 426,121.69 × 172,801.40
  4. Step 4: Simplify right side
    308,770.22x = 73,634,422,039.75
  5. Step 5: Solve for x
    x = 73,634,422,039.75/308,770.22
  6. Step 6: Final answer
    x = 238,476.44

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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.