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Finding the Fourth Proportional to 316,872.78, 437,286.51 and 173,638.86

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Solution

The fourth proportional to 316,872.78, 437,286.51 and 173,638.86 is: 239,622.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,872.78 : 437,286.51 = 173,638.86 : x
  2. Step 2: Convert to fraction form
    316,872.78/437,286.51 = 173,638.86/x
  3. Step 3: Cross multiply
    316,872.78x = 437,286.51 × 173,638.86
  4. Step 4: Simplify right side
    316,872.78x = 75,929,931,089.78
  5. Step 5: Solve for x
    x = 75,929,931,089.78/316,872.78
  6. Step 6: Final answer
    x = 239,622.76

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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.