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Finding the Fourth Proportional to 318,634.53, 439,715.63 and 173,440.88

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Solution

The fourth proportional to 318,634.53, 439,715.63 and 173,440.88 is: 239,348.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,634.53 : 439,715.63 = 173,440.88 : x
  2. Step 2: Convert to fraction form
    318,634.53/439,715.63 = 173,440.88/x
  3. Step 3: Cross multiply
    318,634.53x = 439,715.63 × 173,440.88
  4. Step 4: Simplify right side
    318,634.53x = 76,264,664,949.75
  5. Step 5: Solve for x
    x = 76,264,664,949.75/318,634.53
  6. Step 6: Final answer
    x = 239,348.40

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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.