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Finding the Fourth Proportional to 316,425.62, 436,665.80 and 171,231.30

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Solution

The fourth proportional to 316,425.62, 436,665.80 and 171,231.30 is: 236,298.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,425.62 : 436,665.80 = 171,231.30 : x
  2. Step 2: Convert to fraction form
    316,425.62/436,665.80 = 171,231.30/x
  3. Step 3: Cross multiply
    316,425.62x = 436,665.80 × 171,231.30
  4. Step 4: Simplify right side
    316,425.62x = 74,770,853,027.62
  5. Step 5: Solve for x
    x = 74,770,853,027.62/316,425.62
  6. Step 6: Final answer
    x = 236,298.35

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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.