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Finding the Fourth Proportional to 307,819.80, 461,729.70 and 141,607.80

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Solution

The fourth proportional to 307,819.80, 461,729.70 and 141,607.80 is: 212,411.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,819.80 : 461,729.70 = 141,607.80 : x
  2. Step 2: Convert to fraction form
    307,819.80/461,729.70 = 141,607.80/x
  3. Step 3: Cross multiply
    307,819.80x = 461,729.70 × 141,607.80
  4. Step 4: Simplify right side
    307,819.80x = 65,384,527,011.66
  5. Step 5: Solve for x
    x = 65,384,527,011.66/307,819.80
  6. Step 6: Final answer
    x = 212,411.70

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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.