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Finding the Fourth Proportional to 347,256.40, 520,942.20 and 136,901.20

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Solution

The fourth proportional to 347,256.40, 520,942.20 and 136,901.20 is: 205,374.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,256.40 : 520,942.20 = 136,901.20 : x
  2. Step 2: Convert to fraction form
    347,256.40/520,942.20 = 136,901.20/x
  3. Step 3: Cross multiply
    347,256.40x = 520,942.20 × 136,901.20
  4. Step 4: Simplify right side
    347,256.40x = 71,317,612,310.64
  5. Step 5: Solve for x
    x = 71,317,612,310.64/347,256.40
  6. Step 6: Final answer
    x = 205,374.51

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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.