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Finding the Fourth Proportional to 458,395.77, 687,734.43 and 218,815.39

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Solution

The fourth proportional to 458,395.77, 687,734.43 and 218,815.39 is: 328,290.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,395.77 : 687,734.43 = 218,815.39 : x
  2. Step 2: Convert to fraction form
    458,395.77/687,734.43 = 218,815.39/x
  3. Step 3: Cross multiply
    458,395.77x = 687,734.43 × 218,815.39
  4. Step 4: Simplify right side
    458,395.77x = 150,486,875,797.54
  5. Step 5: Solve for x
    x = 150,486,875,797.54/458,395.77
  6. Step 6: Final answer
    x = 328,290.28

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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.