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Finding the Fourth Proportional to 309,149.49, 426,618.86 and 173,189.17

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Solution

The fourth proportional to 309,149.49, 426,618.86 and 173,189.17 is: 238,996.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,149.49 : 426,618.86 = 173,189.17 : x
  2. Step 2: Convert to fraction form
    309,149.49/426,618.86 = 173,189.17/x
  3. Step 3: Cross multiply
    309,149.49x = 426,618.86 × 173,189.17
  4. Step 4: Simplify right side
    309,149.49x = 73,885,765,937.07
  5. Step 5: Solve for x
    x = 73,885,765,937.07/309,149.49
  6. Step 6: Final answer
    x = 238,996.88

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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.