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Finding the Fourth Proportional to 515,570.64, 773,171.40 and 178,520.78

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Solution

The fourth proportional to 515,570.64, 773,171.40 and 178,520.78 is: 267,717.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,570.64 : 773,171.40 = 178,520.78 : x
  2. Step 2: Convert to fraction form
    515,570.64/773,171.40 = 178,520.78/x
  3. Step 3: Cross multiply
    515,570.64x = 773,171.40 × 178,520.78
  4. Step 4: Simplify right side
    515,570.64x = 138,027,157,535.84
  5. Step 5: Solve for x
    x = 138,027,157,535.84/515,570.64
  6. Step 6: Final answer
    x = 267,717.26

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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.