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Finding the Fourth Proportional to 323,280.09, 484,919.81 and 86,616.31

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Solution

The fourth proportional to 323,280.09, 484,919.81 and 86,616.31 is: 129,924.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,280.09 : 484,919.81 = 86,616.31 : x
  2. Step 2: Convert to fraction form
    323,280.09/484,919.81 = 86,616.31/x
  3. Step 3: Cross multiply
    323,280.09x = 484,919.81 × 86,616.31
  4. Step 4: Simplify right side
    323,280.09x = 42,001,964,588.10
  5. Step 5: Solve for x
    x = 42,001,964,588.10/323,280.09
  6. Step 6: Final answer
    x = 129,924.38

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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.