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Finding the Fourth Proportional to 345,474.70, 517,041.60 and 212,439.22

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Solution

The fourth proportional to 345,474.70, 517,041.60 and 212,439.22 is: 317,939.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,474.70 : 517,041.60 = 212,439.22 : x
  2. Step 2: Convert to fraction form
    345,474.70/517,041.60 = 212,439.22/x
  3. Step 3: Cross multiply
    345,474.70x = 517,041.60 × 212,439.22
  4. Step 4: Simplify right side
    345,474.70x = 109,839,914,211.55
  5. Step 5: Solve for x
    x = 109,839,914,211.55/345,474.70
  6. Step 6: Final answer
    x = 317,939.10

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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.