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Finding the Fourth Proportional to 485,176.40, 728,196.60 and 285,246.80

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Solution

The fourth proportional to 485,176.40, 728,196.60 and 285,246.80 is: 428,124.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,176.40 : 728,196.60 = 285,246.80 : x
  2. Step 2: Convert to fraction form
    485,176.40/728,196.60 = 285,246.80/x
  3. Step 3: Cross multiply
    485,176.40x = 728,196.60 × 285,246.80
  4. Step 4: Simplify right side
    485,176.40x = 207,715,749,920.88
  5. Step 5: Solve for x
    x = 207,715,749,920.88/485,176.40
  6. Step 6: Final answer
    x = 428,124.18

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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.