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Finding the Fourth Proportional to 316,641.91, 436,962.57 and 171,445.21

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Solution

The fourth proportional to 316,641.91, 436,962.57 and 171,445.21 is: 236,592.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,641.91 : 436,962.57 = 171,445.21 : x
  2. Step 2: Convert to fraction form
    316,641.91/436,962.57 = 171,445.21/x
  3. Step 3: Cross multiply
    316,641.91x = 436,962.57 × 171,445.21
  4. Step 4: Simplify right side
    316,641.91x = 74,915,139,575.79
  5. Step 5: Solve for x
    x = 74,915,139,575.79/316,641.91
  6. Step 6: Final answer
    x = 236,592.62

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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.