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Finding the Fourth Proportional to 318,874.78, 440,030.56 and 198,013.46

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Solution

The fourth proportional to 318,874.78, 440,030.56 and 198,013.46 is: 273,248.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,874.78 : 440,030.56 = 198,013.46 : x
  2. Step 2: Convert to fraction form
    318,874.78/440,030.56 = 198,013.46/x
  3. Step 3: Cross multiply
    318,874.78x = 440,030.56 × 198,013.46
  4. Step 4: Simplify right side
    318,874.78x = 87,131,973,691.34
  5. Step 5: Solve for x
    x = 87,131,973,691.34/318,874.78
  6. Step 6: Final answer
    x = 273,248.24

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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.