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Finding the Fourth Proportional to 236,890.40, 354,644.40 and 212,007.20

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Solution

The fourth proportional to 236,890.40, 354,644.40 and 212,007.20 is: 317,392.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,890.40 : 354,644.40 = 212,007.20 : x
  2. Step 2: Convert to fraction form
    236,890.40/354,644.40 = 212,007.20/x
  3. Step 3: Cross multiply
    236,890.40x = 354,644.40 × 212,007.20
  4. Step 4: Simplify right side
    236,890.40x = 75,187,166,239.68
  5. Step 5: Solve for x
    x = 75,187,166,239.68/236,890.40
  6. Step 6: Final answer
    x = 317,392.20

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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.