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Finding the Fourth Proportional to 485,396.84, 727,523.39 and 218,845.28

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Solution

The fourth proportional to 485,396.84, 727,523.39 and 218,845.28 is: 328,010.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,396.84 : 727,523.39 = 218,845.28 : x
  2. Step 2: Convert to fraction form
    485,396.84/727,523.39 = 218,845.28/x
  3. Step 3: Cross multiply
    485,396.84x = 727,523.39 × 218,845.28
  4. Step 4: Simplify right side
    485,396.84x = 159,215,055,259.26
  5. Step 5: Solve for x
    x = 159,215,055,259.26/485,396.84
  6. Step 6: Final answer
    x = 328,010.08

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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.