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Finding the Fourth Proportional to 318,294.28, 439,098.42 and 190,748.44

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Solution

The fourth proportional to 318,294.28, 439,098.42 and 190,748.44 is: 263,144.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,294.28 : 439,098.42 = 190,748.44 : x
  2. Step 2: Convert to fraction form
    318,294.28/439,098.42 = 190,748.44/x
  3. Step 3: Cross multiply
    318,294.28x = 439,098.42 × 190,748.44
  4. Step 4: Simplify right side
    318,294.28x = 83,757,338,621.46
  5. Step 5: Solve for x
    x = 83,757,338,621.46/318,294.28
  6. Step 6: Final answer
    x = 263,144.34

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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.