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Finding the Fourth Proportional to 404,752.80, 607,129.20 and 326,020.80

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Solution

The fourth proportional to 404,752.80, 607,129.20 and 326,020.80 is: 489,031.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,752.80 : 607,129.20 = 326,020.80 : x
  2. Step 2: Convert to fraction form
    404,752.80/607,129.20 = 326,020.80/x
  3. Step 3: Cross multiply
    404,752.80x = 607,129.20 × 326,020.80
  4. Step 4: Simplify right side
    404,752.80x = 197,936,747,487.36
  5. Step 5: Solve for x
    x = 197,936,747,487.36/404,752.80
  6. Step 6: Final answer
    x = 489,031.20

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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.