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Finding the Fourth Proportional to 515,673.64, 773,520.64 and 178,725.29

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Solution

The fourth proportional to 515,673.64, 773,520.64 and 178,725.29 is: 268,091.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,673.64 : 773,520.64 = 178,725.29 : x
  2. Step 2: Convert to fraction form
    515,673.64/773,520.64 = 178,725.29/x
  3. Step 3: Cross multiply
    515,673.64x = 773,520.64 × 178,725.29
  4. Step 4: Simplify right side
    515,673.64x = 138,247,696,390.57
  5. Step 5: Solve for x
    x = 138,247,696,390.57/515,673.64
  6. Step 6: Final answer
    x = 268,091.45

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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.