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Finding the Fourth Proportional to 489,028.80, 733,543.20 and 485,918.40

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Solution

The fourth proportional to 489,028.80, 733,543.20 and 485,918.40 is: 728,877.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,028.80 : 733,543.20 = 485,918.40 : x
  2. Step 2: Convert to fraction form
    489,028.80/733,543.20 = 485,918.40/x
  3. Step 3: Cross multiply
    489,028.80x = 733,543.20 × 485,918.40
  4. Step 4: Simplify right side
    489,028.80x = 356,442,138,074.88
  5. Step 5: Solve for x
    x = 356,442,138,074.88/489,028.80
  6. Step 6: Final answer
    x = 728,877.60

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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.