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Finding the Fourth Proportional to 316,630.86, 436,951.24 and 171,438.21

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Solution

The fourth proportional to 316,630.86, 436,951.24 and 171,438.21 is: 236,585.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,630.86 : 436,951.24 = 171,438.21 : x
  2. Step 2: Convert to fraction form
    316,630.86/436,951.24 = 171,438.21/x
  3. Step 3: Cross multiply
    316,630.86x = 436,951.24 × 171,438.21
  4. Step 4: Simplify right side
    316,630.86x = 74,910,138,014.28
  5. Step 5: Solve for x
    x = 74,910,138,014.28/316,630.86
  6. Step 6: Final answer
    x = 236,585.08

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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.