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Finding the Fourth Proportional to 347,072.40, 520,738.20 and 136,856.88

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Solution

The fourth proportional to 347,072.40, 520,738.20 and 136,856.88 is: 205,336.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,072.40 : 520,738.20 = 136,856.88 : x
  2. Step 2: Convert to fraction form
    347,072.40/520,738.20 = 136,856.88/x
  3. Step 3: Cross multiply
    347,072.40x = 520,738.20 × 136,856.88
  4. Step 4: Simplify right side
    347,072.40x = 71,266,605,348.82
  5. Step 5: Solve for x
    x = 71,266,605,348.82/347,072.40
  6. Step 6: Final answer
    x = 205,336.42

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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.