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Finding the Fourth Proportional to 252,661.20, 378,962.40 and 65,687.28

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Solution

The fourth proportional to 252,661.20, 378,962.40 and 65,687.28 is: 98,523.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,661.20 : 378,962.40 = 65,687.28 : x
  2. Step 2: Convert to fraction form
    252,661.20/378,962.40 = 65,687.28/x
  3. Step 3: Cross multiply
    252,661.20x = 378,962.40 × 65,687.28
  4. Step 4: Simplify right side
    252,661.20x = 24,893,009,278.27
  5. Step 5: Solve for x
    x = 24,893,009,278.27/252,661.20
  6. Step 6: Final answer
    x = 98,523.28

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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.