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Finding the Fourth Proportional to 252,108.40, 378,725.80 and 210,636.40

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Solution

The fourth proportional to 252,108.40, 378,725.80 and 210,636.40 is: 316,425.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,108.40 : 378,725.80 = 210,636.40 : x
  2. Step 2: Convert to fraction form
    252,108.40/378,725.80 = 210,636.40/x
  3. Step 3: Cross multiply
    252,108.40x = 378,725.80 × 210,636.40
  4. Step 4: Simplify right side
    252,108.40x = 79,773,439,099.12
  5. Step 5: Solve for x
    x = 79,773,439,099.12/252,108.40
  6. Step 6: Final answer
    x = 316,425.15

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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.