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Finding the Fourth Proportional to 345,475.70, 517,043.10 and 212,440.22

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Solution

The fourth proportional to 345,475.70, 517,043.10 and 212,440.22 is: 317,940.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,475.70 : 517,043.10 = 212,440.22 : x
  2. Step 2: Convert to fraction form
    345,475.70/517,043.10 = 212,440.22/x
  3. Step 3: Cross multiply
    345,475.70x = 517,043.10 × 212,440.22
  4. Step 4: Simplify right side
    345,475.70x = 109,840,749,913.48
  5. Step 5: Solve for x
    x = 109,840,749,913.48/345,475.70
  6. Step 6: Final answer
    x = 317,940.60

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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.