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Finding the Fourth Proportional to 316,638.92, 436,958.44 and 171,442.21

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Solution

The fourth proportional to 316,638.92, 436,958.44 and 171,442.21 is: 236,588.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,638.92 : 436,958.44 = 171,442.21 : x
  2. Step 2: Convert to fraction form
    316,638.92/436,958.44 = 171,442.21/x
  3. Step 3: Cross multiply
    316,638.92x = 436,958.44 × 171,442.21
  4. Step 4: Simplify right side
    316,638.92x = 74,913,120,631.75
  5. Step 5: Solve for x
    x = 74,913,120,631.75/316,638.92
  6. Step 6: Final answer
    x = 236,588.48

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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.