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Finding the Fourth Proportional to 806,728.80, 1,207,468.80 and 628,269.60

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Solution

The fourth proportional to 806,728.80, 1,207,468.80 and 628,269.60 is: 940,360.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,728.80 : 1,207,468.80 = 628,269.60 : x
  2. Step 2: Convert to fraction form
    806,728.80/1,207,468.80 = 628,269.60/x
  3. Step 3: Cross multiply
    806,728.80x = 1,207,468.80 × 628,269.60
  4. Step 4: Simplify right side
    806,728.80x = 758,615,939,988.48
  5. Step 5: Solve for x
    x = 758,615,939,988.48/806,728.80
  6. Step 6: Final answer
    x = 940,360.55

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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.