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Finding the Fourth Proportional to 286,905.60, 430,228.80 and 129,052.80

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Solution

The fourth proportional to 286,905.60, 430,228.80 and 129,052.80 is: 193,520.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,905.60 : 430,228.80 = 129,052.80 : x
  2. Step 2: Convert to fraction form
    286,905.60/430,228.80 = 129,052.80/x
  3. Step 3: Cross multiply
    286,905.60x = 430,228.80 × 129,052.80
  4. Step 4: Simplify right side
    286,905.60x = 55,522,231,280.64
  5. Step 5: Solve for x
    x = 55,522,231,280.64/286,905.60
  6. Step 6: Final answer
    x = 193,520.90

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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.