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Finding the Fourth Proportional to 485,854.20, 728,562.60 and 219,477.60

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Solution

The fourth proportional to 485,854.20, 728,562.60 and 219,477.60 is: 329,117.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,854.20 : 728,562.60 = 219,477.60 : x
  2. Step 2: Convert to fraction form
    485,854.20/728,562.60 = 219,477.60/x
  3. Step 3: Cross multiply
    485,854.20x = 728,562.60 × 219,477.60
  4. Step 4: Simplify right side
    485,854.20x = 159,903,170,897.76
  5. Step 5: Solve for x
    x = 159,903,170,897.76/485,854.20
  6. Step 6: Final answer
    x = 329,117.61

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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.