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Finding the Fourth Proportional to 316,958.76, 436,621.86 and 271,488.60

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Solution

The fourth proportional to 316,958.76, 436,621.86 and 271,488.60 is: 373,985.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,958.76 : 436,621.86 = 271,488.60 : x
  2. Step 2: Convert to fraction form
    316,958.76/436,621.86 = 271,488.60/x
  3. Step 3: Cross multiply
    316,958.76x = 436,621.86 × 271,488.60
  4. Step 4: Simplify right side
    316,958.76x = 118,537,857,500.80
  5. Step 5: Solve for x
    x = 118,537,857,500.80/316,958.76
  6. Step 6: Final answer
    x = 373,985.11

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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.