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Finding the Fourth Proportional to 485,092.40, 727,638.60 and 298,209.20

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Solution

The fourth proportional to 485,092.40, 727,638.60 and 298,209.20 is: 447,313.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,092.40 : 727,638.60 = 298,209.20 : x
  2. Step 2: Convert to fraction form
    485,092.40/727,638.60 = 298,209.20/x
  3. Step 3: Cross multiply
    485,092.40x = 727,638.60 × 298,209.20
  4. Step 4: Simplify right side
    485,092.40x = 216,988,524,795.12
  5. Step 5: Solve for x
    x = 216,988,524,795.12/485,092.40
  6. Step 6: Final answer
    x = 447,313.80

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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.