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Finding the Fourth Proportional to 316,630.46, 436,955.10 and 173,388

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Solution

The fourth proportional to 316,630.46, 436,955.10 and 173,388 is: 239,278.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,630.46 : 436,955.10 = 173,388 : x
  2. Step 2: Convert to fraction form
    316,630.46/436,955.10 = 173,388/x
  3. Step 3: Cross multiply
    316,630.46x = 436,955.10 × 173,388
  4. Step 4: Simplify right side
    316,630.46x = 75,762,770,878.80
  5. Step 5: Solve for x
    x = 75,762,770,878.80/316,630.46
  6. Step 6: Final answer
    x = 239,278.21

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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.