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Finding the Fourth Proportional to 457,258.80, 685,909.80 and 141,936.60

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Solution

The fourth proportional to 457,258.80, 685,909.80 and 141,936.60 is: 212,911.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,258.80 : 685,909.80 = 141,936.60 : x
  2. Step 2: Convert to fraction form
    457,258.80/685,909.80 = 141,936.60/x
  3. Step 3: Cross multiply
    457,258.80x = 685,909.80 × 141,936.60
  4. Step 4: Simplify right side
    457,258.80x = 97,355,704,918.68
  5. Step 5: Solve for x
    x = 97,355,704,918.68/457,258.80
  6. Step 6: Final answer
    x = 212,911.60

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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.