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Finding the Fourth Proportional to 485,205.80, 727,808.70 and 219,266.60

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Solution

The fourth proportional to 485,205.80, 727,808.70 and 219,266.60 is: 328,899.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,205.80 : 727,808.70 = 219,266.60 : x
  2. Step 2: Convert to fraction form
    485,205.80/727,808.70 = 219,266.60/x
  3. Step 3: Cross multiply
    485,205.80x = 727,808.70 × 219,266.60
  4. Step 4: Simplify right side
    485,205.80x = 159,584,139,099.42
  5. Step 5: Solve for x
    x = 159,584,139,099.42/485,205.80
  6. Step 6: Final answer
    x = 328,899.90

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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.