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Finding the Fourth Proportional to 486,146.70, 728,600.40 and 272,914.20

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Solution

The fourth proportional to 486,146.70, 728,600.40 and 272,914.20 is: 409,023.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,146.70 : 728,600.40 = 272,914.20 : x
  2. Step 2: Convert to fraction form
    486,146.70/728,600.40 = 272,914.20/x
  3. Step 3: Cross multiply
    486,146.70x = 728,600.40 × 272,914.20
  4. Step 4: Simplify right side
    486,146.70x = 198,845,395,285.68
  5. Step 5: Solve for x
    x = 198,845,395,285.68/486,146.70
  6. Step 6: Final answer
    x = 409,023.44

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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.