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Finding the Fourth Proportional to 329,424.90, 494,137.35 and 129,636.78

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Solution

The fourth proportional to 329,424.90, 494,137.35 and 129,636.78 is: 194,455.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,424.90 : 494,137.35 = 129,636.78 : x
  2. Step 2: Convert to fraction form
    329,424.90/494,137.35 = 129,636.78/x
  3. Step 3: Cross multiply
    329,424.90x = 494,137.35 × 129,636.78
  4. Step 4: Simplify right side
    329,424.90x = 64,058,374,931.73
  5. Step 5: Solve for x
    x = 64,058,374,931.73/329,424.90
  6. Step 6: Final answer
    x = 194,455.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.