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Finding the Fourth Proportional to 307,729.60, 461,248.80 and 130,206.40

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Solution

The fourth proportional to 307,729.60, 461,248.80 and 130,206.40 is: 195,163.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,729.60 : 461,248.80 = 130,206.40 : x
  2. Step 2: Convert to fraction form
    307,729.60/461,248.80 = 130,206.40/x
  3. Step 3: Cross multiply
    307,729.60x = 461,248.80 × 130,206.40
  4. Step 4: Simplify right side
    307,729.60x = 60,057,545,752.32
  5. Step 5: Solve for x
    x = 60,057,545,752.32/307,729.60
  6. Step 6: Final answer
    x = 195,163.37

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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.